| Message ID | cover.1594734381.git.lorenzo@kernel.org |
|---|---|
| Headers | show |
| Series | introduce support for XDP programs in CPUMAP | expand |
On Tue, Jul 14, 2020 at 6:56 AM Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the > capability to attach and run a XDP program to CPUMAP entries. > The idea behind this feature is to add the possibility to define on which CPU > run the eBPF program if the underlying hw does not support RSS. > I respin patch 1/6 from a previous series sent by David [2]. > The functionality has been tested on Marvell Espressobin, i40e and mlx5. > Detailed tests results can be found here: > https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org > > Changes since v6: > - rebase on top of bpf-next > - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line fyi. I'm waiting on Daniel to do one more look, since he commented in the past.
> On Tue, Jul 14, 2020 at 6:56 AM Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > > > Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the > > capability to attach and run a XDP program to CPUMAP entries. > > The idea behind this feature is to add the possibility to define on which CPU > > run the eBPF program if the underlying hw does not support RSS. > > I respin patch 1/6 from a previous series sent by David [2]. > > The functionality has been tested on Marvell Espressobin, i40e and mlx5. > > Detailed tests results can be found here: > > https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org > > > > Changes since v6: > > - rebase on top of bpf-next > > - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line > > fyi. I'm waiting on Daniel to do one more look, since he commented in the past. ack, thx. I have just figured out today that v6 is not applying anymore. Regards, Lorenzo
On 7/14/20 5:35 PM, Lorenzo Bianconi wrote: >> On Tue, Jul 14, 2020 at 6:56 AM Lorenzo Bianconi <lorenzo@kernel.org> wrote: >>> >>> Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the >>> capability to attach and run a XDP program to CPUMAP entries. >>> The idea behind this feature is to add the possibility to define on which CPU >>> run the eBPF program if the underlying hw does not support RSS. >>> I respin patch 1/6 from a previous series sent by David [2]. >>> The functionality has been tested on Marvell Espressobin, i40e and mlx5. >>> Detailed tests results can be found here: >>> https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org >>> >>> Changes since v6: >>> - rebase on top of bpf-next >>> - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line >> >> fyi. I'm waiting on Daniel to do one more look, since he commented in the past. > > ack, thx. I have just figured out today that v6 is not applying anymore. LGTM, I've applied it, thanks!
On Tue, 14 Jul 2020 15:56:33 +0200 Lorenzo Bianconi <lorenzo@kernel.org> wrote: > Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the > capability to attach and run a XDP program to CPUMAP entries. > The idea behind this feature is to add the possibility to define on which CPU > run the eBPF program if the underlying hw does not support RSS. > I respin patch 1/6 from a previous series sent by David [2]. > The functionality has been tested on Marvell Espressobin, i40e and mlx5. > Detailed tests results can be found here: > https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org > > Changes since v6: > - rebase on top of bpf-next > - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line > > Changes since v5: > - move bpf_prog_put() in put_cpu_map_entry() > - remove READ_ONCE(rcpu->prog) in cpu_map_bpf_prog_run_xdp > - rely on bpf_prog_get_type() instead of bpf_prog_get_type_dev() in > __cpu_map_load_bpf_program() > > Changes since v4: > - move xdp_clear_return_frame_no_direct inside rcu section > - update David Ahern's email address > > Changes since v3: > - fix typo in commit message > - fix access to ctx->ingress_ifindex in cpumap bpf selftest > > Changes since v2: > - improved comments > - fix return value in xdp_convert_buff_to_frame > - added patch 1/9: "cpumap: use non-locked version __ptr_ring_consume_batched" > - do not run kmem_cache_alloc_bulk if all frames have been consumed by the XDP > program attached to the CPUMAP entry > - removed bpf_trace_printk in kselftest > > Changes since v1: > - added performance test results > - added kselftest support > - fixed memory accounting with page_pool > - extended xdp_redirect_cpu_user.c to load an external program to perform > redirect > - reported ifindex to attached eBPF program > - moved bpf_cpumap_val definition to include/uapi/linux/bpf.h > > [1] https://patchwork.ozlabs.org/project/netdev/cover/20200529220716.75383-1-dsahern@kernel.org/ > [2] https://patchwork.ozlabs.org/project/netdev/patch/20200513014607.40418-2-dsahern@kernel.org/ > > David Ahern (1): > net: refactor xdp_convert_buff_to_frame > > Jesper Dangaard Brouer (1): > cpumap: use non-locked version __ptr_ring_consume_batched > > Lorenzo Bianconi (7): > samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option > loop > cpumap: formalize map value as a named struct > bpf: cpumap: add the possibility to attach an eBPF program to cpumap > bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map > entries > libbpf: add SEC name for xdp programs attached to CPUMAP > samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap > selftest: add tests for XDP programs in CPUMAP entries > > include/linux/bpf.h | 6 + > include/net/xdp.h | 41 ++-- > include/trace/events/xdp.h | 16 +- > include/uapi/linux/bpf.h | 14 ++ > kernel/bpf/cpumap.c | 162 +++++++++++--- > net/core/dev.c | 9 + > samples/bpf/xdp_redirect_cpu_kern.c | 25 ++- > samples/bpf/xdp_redirect_cpu_user.c | 209 ++++++++++++++++-- > tools/include/uapi/linux/bpf.h | 14 ++ > tools/lib/bpf/libbpf.c | 2 + > .../bpf/prog_tests/xdp_cpumap_attach.c | 70 ++++++ > .../bpf/progs/test_xdp_with_cpumap_helpers.c | 36 +++ > 12 files changed, 531 insertions(+), 73 deletions(-) > create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c > create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c > This started showing up with when running ./test_progs from recent bpf-next (bfdfa51702de). Any chance it is related? [ 2950.440613] ============================================= [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 seconds. [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3a516b #814 [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 3073.293021] cpumap/0/map:26 D 0 536 2 0x00004000 [ 3073.295755] Call Trace: [ 3073.297143] __schedule+0x5ad/0xf10 [ 3073.299032] ? pci_mmcfg_check_reserved+0xd0/0xd0 [ 3073.301416] ? static_obj+0x31/0x80 [ 3073.303277] ? mark_held_locks+0x24/0x90 [ 3073.305313] ? cpu_map_update_elem+0x6d0/0x6d0 [ 3073.307544] schedule+0x6f/0x160 [ 3073.309282] schedule_preempt_disabled+0x14/0x20 [ 3073.311593] kthread+0x175/0x240 [ 3073.313299] ? kthread_create_on_node+0xd0/0xd0 [ 3073.315106] ret_from_fork+0x1f/0x30 [ 3073.316365] Showing all locks held in the system: [ 3073.318423] 1 lock held by khungtaskd/33: [ 3073.319642] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 [ 3073.322249] =============================================
On Fri, 17 Jul 2020 12:00:13 +0200 Jakub Sitnicki <jakub@cloudflare.com> wrote: > On Tue, 14 Jul 2020 15:56:33 +0200 > Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > > Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the > > capability to attach and run a XDP program to CPUMAP entries. > > The idea behind this feature is to add the possibility to define on which CPU > > run the eBPF program if the underlying hw does not support RSS. > > I respin patch 1/6 from a previous series sent by David [2]. > > The functionality has been tested on Marvell Espressobin, i40e and mlx5. > > Detailed tests results can be found here: > > https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org > > > > Changes since v6: > > - rebase on top of bpf-next > > - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line > > > > Changes since v5: > > - move bpf_prog_put() in put_cpu_map_entry() > > - remove READ_ONCE(rcpu->prog) in cpu_map_bpf_prog_run_xdp > > - rely on bpf_prog_get_type() instead of bpf_prog_get_type_dev() in > > __cpu_map_load_bpf_program() > > > > Changes since v4: > > - move xdp_clear_return_frame_no_direct inside rcu section > > - update David Ahern's email address > > > > Changes since v3: > > - fix typo in commit message > > - fix access to ctx->ingress_ifindex in cpumap bpf selftest > > > > Changes since v2: > > - improved comments > > - fix return value in xdp_convert_buff_to_frame > > - added patch 1/9: "cpumap: use non-locked version __ptr_ring_consume_batched" > > - do not run kmem_cache_alloc_bulk if all frames have been consumed by the XDP > > program attached to the CPUMAP entry > > - removed bpf_trace_printk in kselftest > > > > Changes since v1: > > - added performance test results > > - added kselftest support > > - fixed memory accounting with page_pool > > - extended xdp_redirect_cpu_user.c to load an external program to perform > > redirect > > - reported ifindex to attached eBPF program > > - moved bpf_cpumap_val definition to include/uapi/linux/bpf.h > > > > [1] https://patchwork.ozlabs.org/project/netdev/cover/20200529220716.75383-1-dsahern@kernel.org/ > > [2] https://patchwork.ozlabs.org/project/netdev/patch/20200513014607.40418-2-dsahern@kernel.org/ > > > > David Ahern (1): > > net: refactor xdp_convert_buff_to_frame > > > > Jesper Dangaard Brouer (1): > > cpumap: use non-locked version __ptr_ring_consume_batched > > > > Lorenzo Bianconi (7): > > samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option > > loop > > cpumap: formalize map value as a named struct > > bpf: cpumap: add the possibility to attach an eBPF program to cpumap > > bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map > > entries > > libbpf: add SEC name for xdp programs attached to CPUMAP > > samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap > > selftest: add tests for XDP programs in CPUMAP entries > > > > include/linux/bpf.h | 6 + > > include/net/xdp.h | 41 ++-- > > include/trace/events/xdp.h | 16 +- > > include/uapi/linux/bpf.h | 14 ++ > > kernel/bpf/cpumap.c | 162 +++++++++++--- > > net/core/dev.c | 9 + > > samples/bpf/xdp_redirect_cpu_kern.c | 25 ++- > > samples/bpf/xdp_redirect_cpu_user.c | 209 ++++++++++++++++-- > > tools/include/uapi/linux/bpf.h | 14 ++ > > tools/lib/bpf/libbpf.c | 2 + > > .../bpf/prog_tests/xdp_cpumap_attach.c | 70 ++++++ > > .../bpf/progs/test_xdp_with_cpumap_helpers.c | 36 +++ > > 12 files changed, 531 insertions(+), 73 deletions(-) > > create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c > > create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c > > > > This started showing up with when running ./test_progs from recent > bpf-next (bfdfa51702de). Any chance it is related? > > [ 2950.440613] ============================================= > > [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 seconds. > [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3a516b #814 > [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 3073.293021] cpumap/0/map:26 D 0 536 2 0x00004000 > [ 3073.295755] Call Trace: > [ 3073.297143] __schedule+0x5ad/0xf10 > [ 3073.299032] ? pci_mmcfg_check_reserved+0xd0/0xd0 > [ 3073.301416] ? static_obj+0x31/0x80 > [ 3073.303277] ? mark_held_locks+0x24/0x90 > [ 3073.305313] ? cpu_map_update_elem+0x6d0/0x6d0 > [ 3073.307544] schedule+0x6f/0x160 > [ 3073.309282] schedule_preempt_disabled+0x14/0x20 > [ 3073.311593] kthread+0x175/0x240 > [ 3073.313299] ? kthread_create_on_node+0xd0/0xd0 > [ 3073.315106] ret_from_fork+0x1f/0x30 > [ 3073.316365] > Showing all locks held in the system: > [ 3073.318423] 1 lock held by khungtaskd/33: > [ 3073.319642] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 > > [ 3073.322249] ============================================= 'test_maps' looks sad :-( Not sure if related. bash-5.0# ./test_maps Fork 1024 tasks to 'test_update_delete' Fork 1024 tasks to 'test_update_delete' Fork 100 tasks to 'test_hashmap' Fork 100 tasks to 'test_hashmap_percpu' Fork 100 tasks to 'test_hashmap_sizes' [ 66.961150] test_maps invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 [ 66.962490] CPU: 3 PID: 3263 Comm: test_maps Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 [ 66.963617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 66.965958] Call Trace: [ 66.966404] dump_stack+0x9e/0xe0 [ 66.966978] dump_header+0x89/0x49a [ 66.967624] oom_kill_process.cold+0xb/0x10 [ 66.968379] out_of_memory+0x1b1/0x820 [ 66.969060] ? oom_killer_disable+0x210/0x210 [ 66.969833] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 [ 66.970852] ? warn_alloc+0x120/0x120 [ 66.971508] ? __alloc_pages_nodemask+0x30f/0x5c0 [ 66.972237] __alloc_pages_nodemask+0x4fd/0x5c0 [ 66.972863] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 [ 66.973681] ? find_held_lock+0x85/0xa0 [ 66.974223] ? lock_downgrade+0x360/0x360 [ 66.974760] ? policy_nodemask+0x19/0x90 [ 66.975266] ? policy_node+0x56/0x60 [ 66.975719] pagecache_get_page+0xf7/0x360 [ 66.976259] filemap_fault+0xe4a/0xfe0 [ 66.976743] ? read_cache_page_gfp+0x20/0x20 [ 66.977274] ? find_held_lock+0x85/0xa0 [ 66.977792] ? filemap_page_mkwrite+0x140/0x140 [ 66.978383] __do_fault+0x6a/0x1e0 [ 66.978789] handle_mm_fault+0x16eb/0x1fb0 [ 66.979319] ? copy_page_range+0xf80/0xf80 [ 66.979755] ? vmacache_find+0xba/0x100 [ 66.980166] do_user_addr_fault+0x2ce/0x5ed [ 66.980625] exc_page_fault+0x5e/0xc0 [ 66.981005] ? asm_exc_page_fault+0x8/0x30 [ 66.981445] asm_exc_page_fault+0x1e/0x30 [ 66.981860] RIP: 0033:0x7f33d40901bd [ 66.982248] Code: Bad RIP value. [ 66.982579] RSP: 002b:00007ffe84e1dd18 EFLAGS: 00010202 [ 66.983143] RAX: fffffffffffffff4 RBX: 0000000000000002 RCX: 00007f33d40901bd [ 66.984038] RDX: 0000000000000078 RSI: 00007ffe84e1dd50 RDI: 0000000000000000 [ 66.984831] RBP: 00007ffe84e1dd30 R08: 00007ffe84e1dd50 R09: 00007ffe84e1dd50 [ 66.985619] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000020000 [ 66.986399] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000060 [ 66.987656] Mem-Info: [ 66.987924] active_anon:1424 inactive_anon:126 isolated_anon:0 [ 66.987924] active_file:53 inactive_file:33 isolated_file:0 [ 66.987924] unevictable:0 dirty:0 writeback:0 [ 66.987924] slab_reclaimable:11120 slab_unreclaimable:98031 [ 66.987924] mapped:88 shmem:137 pagetables:120 bounce:0 [ 66.987924] free:21175 free_pcp:725 free_cma:0 [ 66.993308] Node 0 active_anon:5696kB inactive_anon:504kB active_file:212kB inactive_file:132kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:352kB dirty:0kB writeback:0kB shmem:548kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB all_unreclaimable? yes [ 66.997665] Node 0 DMA free:13708kB min:308kB low:384kB high:460kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:96kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB [ 67.002330] lowmem_reserve[]: 0 2925 3354 3354 [ 67.003090] Node 0 DMA32 free:60008kB min:58668kB low:73332kB high:87996kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129212kB managed:3001752kB mlocked:0kB kernel_stack:25536kB pagetables:292kB bounce:0kB free_pcp:844kB local_pcp:248kB free_cma:0kB [ 67.008157] lowmem_reserve[]: 0 0 428 428 [ 67.008843] Node 0 Normal free:9528kB min:8600kB low:10748kB high:12896kB reserved_highatomic:2048KB active_anon:5404kB inactive_anon:504kB active_file:336kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:439260kB mlocked:0kB kernel_stack:5824kB pagetables:128kB bounce:0kB free_pcp:1596kB local_pcp:660kB free_cma:0kB [ 67.014007] lowmem_reserve[]: 0 0 0 0 [ 67.014673] Node 0 DMA: 1*4kB (U) 1*8kB (U) 2*16kB (UE) 1*32kB (U) 1*64kB (E) 2*128kB (UE) 2*256kB (UE) 1*512kB (E) 2*1024kB (UE) 3*2048kB (UME) 1*4096kB (M) = 13708kB [ 67.016793] Node 0 DMA32: 8*4kB (UM) 5*8kB (UM) 4*16kB (UME) 8*32kB (UME) 7*64kB (ME) 8*128kB (UME) 6*256kB (UM) 8*512kB (ME) 3*1024kB (M) 2*2048kB (ME) 11*4096kB (M) = 59720kB [ 67.018915] Node 0 Normal: 256*4kB (UME) 149*8kB (UM) 89*16kB (UM) 41*32kB (UM) 20*64kB (UMH) 8*128kB (UM) 2*256kB (MH) 1*512kB (H) 1*1024kB (H) 0*2048kB 0*4096kB = 9304kB [ 67.020673] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB [ 67.021811] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB [ 67.022768] 184 total pagecache pages [ 67.023418] 0 pages in swap cache [ 67.023912] Swap cache stats: add 0, delete 0, find 0/0 [ 67.024726] Free swap = 0kB [ 67.025150] Total swap = 0kB [ 67.025530] 1048445 pages RAM [ 67.025865] 0 pages HighMem/MovableOnly [ 67.026510] 184215 pages reserved [ 67.027002] 0 pages cma reserved [ 67.027542] 0 pages hwpoisoned [ 67.027928] Unreclaimable slab info: [ 67.028500] Name Used Total [ 67.029057] 9p-fcall-cache 297KB 445KB [ 67.029793] 9p-fcall-cache 49KB 49KB [ 67.030375] 9p-fcall-cache 123KB 272KB [ 67.030897] 9p-fcall-cache 346KB 495KB [ 67.031539] p9_req_t 16KB 16KB [ 67.032326] fib6_nodes 4KB 4KB [ 67.032950] RAWv6 31KB 31KB [ 67.033960] mqueue_inode_cache 31KB 31KB [ 67.034708] ext4_bio_post_read_ctx 15KB 15KB [ 67.035647] bio-2 7KB 7KB [ 67.036471] UNIX 372KB 372KB [ 67.037769] tcp_bind_bucket 4KB 4KB [ 67.038701] ip_fib_trie 4KB 4KB [ 67.039496] ip_fib_alias 3KB 3KB [ 67.040414] ip_dst_cache 4KB 4KB [ 67.041365] RAW 31KB 31KB [ 67.042341] UDP 121KB 121KB [ 67.043540] tw_sock_TCP 7KB 7KB [ 67.044491] request_sock_TCP 7KB 7KB [ 67.045447] TCP 58KB 58KB [ 67.046445] hugetlbfs_inode_cache 31KB 31KB [ 67.047443] bio-1 15KB 15KB [ 67.048375] eventpoll_pwq 23KB 23KB [ 67.049388] eventpoll_epi 35KB 35KB [ 67.050361] inotify_inode_mark 3KB 3KB [ 67.051399] request_queue 62KB 62KB [ 67.052563] blkdev_ioc 7KB 7KB [ 67.053623] bio-0 20KB 20KB [ 67.054603] biovec-max 327KB 327KB [ 67.055593] skbuff_fclone_cache 15KB 15KB [ 67.056627] skbuff_head_cache 281KB 312KB [ 67.057868] file_lock_cache 31KB 31KB [ 67.058878] file_lock_ctx 15KB 15KB [ 67.059874] fsnotify_mark_connector 4KB 4KB [ 67.060957] task_delay_info 451KB 451KB [ 67.061644] proc_dir_entry 125KB 125KB [ 67.062404] pde_opener 59KB 59KB [ 67.063696] seq_file 210KB 241KB [ 67.064759] sigqueue 19KB 19KB [ 67.065763] shmem_inode_cache 795KB 795KB [ 67.066778] kernfs_node_cache 2565KB 2565KB [ 67.067762] mnt_cache 31KB 31KB [ 67.068798] filp 11820KB 11820KB [ 67.069807] names_cache 327KB 476KB [ 67.070795] key_jar 15KB 15KB [ 67.071787] nsproxy 3KB 3KB [ 67.072802] vm_area_struct 3236KB 3400KB [ 67.073773] mm_struct 870KB 1154KB [ 67.074787] fs_cache 232KB 264KB [ 67.076008] files_cache 860KB 972KB [ 67.076969] signal_cache 2626KB 2686KB [ 67.077911] sighand_cache 2370KB 2405KB [ 67.078963] task_struct 8564KB 8564KB [ 67.080472] cred_jar 392KB 420KB [ 67.081767] anon_vma_chain 1191KB 1413KB [ 67.082736] anon_vma 200KB 220KB [ 67.083805] pid 593KB 640KB [ 67.084733] Acpi-Operand 265KB 308KB [ 67.085598] Acpi-ParseExt 47KB 47KB [ 67.086504] Acpi-Parse 189KB 205KB [ 67.091509] Acpi-State 200KB 216KB [ 67.092511] Acpi-Namespace 24KB 24KB [ 67.093388] numa_policy 3KB 3KB [ 67.094249] trace_event_file 151KB 151KB [ 67.095076] ftrace_event_field 196KB 196KB [ 67.099230] pool_workqueue 16KB 16KB [ 67.100094] vmap_area 567KB 567KB [ 67.105224] page->ptl 385KB 433KB [ 67.106079] kmemleak_scan_area 286KB 286KB [ 67.107190] kmemleak_object 163919KB 168558KB [ 67.108081] kmalloc-8k 21840KB 21840KB [ 67.108932] kmalloc-4k 24592KB 24592KB [ 67.114003] kmalloc-2k 15684KB 15684KB [ 67.114896] kmalloc-1k 44936KB 44936KB [ 67.121018] kmalloc-512 4192KB 4192KB [ 67.122212] kmalloc-256 1128KB 1128KB [ 67.123089] kmalloc-192 5008KB 5008KB [ 67.128978] kmalloc-128 356KB 356KB [ 67.129877] kmalloc-96 145KB 156KB [ 67.132262] kmalloc-64 1032KB 1032KB [ 67.133085] kmalloc-32 233KB 244KB [ 67.138993] kmalloc-16 108KB 108KB [ 67.139847] kmalloc-8 440KB 533KB [ 67.142221] kmem_cache_node 43KB 43KB [ 67.143038] kmem_cache 140KB 140KB [ 67.149977] Tasks state (memory values in pages): [ 67.150743] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name [ 67.153263] [ 103] 0 103 7766 1042 81920 0 -1000 systemd-udevd [ 67.157980] [ 194] 0 194 1032 136 40960 0 0 bash [ 67.161986] [ 195] 0 195 758 40 45056 0 0 test_maps [ 67.167074] [ 3178] 0 3178 758 39 45056 0 0 test_maps [ 67.170572] [ 3186] 0 3186 758 39 45056 0 0 test_maps [ 67.172052] [ 3205] 0 3205 758 39 45056 0 0 test_maps [ 67.177580] [ 3213] 0 3213 758 39 45056 0 0 test_maps [ 67.179026] [ 3221] 0 3221 758 39 45056 0 0 test_maps [ 67.184143] [ 3222] 0 3222 758 39 45056 0 0 test_maps [ 67.187571] [ 3230] 0 3230 758 39 45056 0 0 test_maps [ 67.189053] [ 3241] 0 3241 758 39 45056 0 0 test_maps [ 67.194580] [ 3243] 0 3243 758 39 45056 0 0 test_maps [ 67.196058] [ 3250] 0 3250 758 39 45056 0 0 test_maps [ 67.201124] [ 3263] 0 3263 758 39 45056 0 0 test_maps [ 67.206581] [ 3298] 0 3298 758 39 45056 0 0 test_maps [ 67.210563] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/,task=bash,pid=194,uid=0 [ 67.214666] Out of memory: Killed process 194 (bash) total-vm:4128kB, anon-rss:544kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:40kB oom_score_adj:0 [ 67.226601] oom_reaper: reaped process 3298 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.228355] oom_reaper: reaped process 3178 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.234148] oom_reaper: reaped process 3222 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.236873] oom_reaper: reaped process 3213 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.239028] oom_reaper: reaped process 3186 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.268146] oom_reaper: reaped process 3221 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB [ 67.275959] kthreadd invoked oom-killer: gfp_mask=0x40cc0(GFP_KERNEL|__GFP_COMP), order=1, oom_score_adj=0 [ 67.277227] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 [ 67.278278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 67.279895] Call Trace: [ 67.280250] dump_stack+0x9e/0xe0 [ 67.280674] dump_header+0x89/0x49a [ 67.281113] out_of_memory.cold+0xa/0xbb [ 67.281608] ? oom_killer_disable+0x210/0x210 [ 67.282157] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 [ 67.282894] ? warn_alloc+0x120/0x120 [ 67.283377] ? __alloc_pages_nodemask+0x30f/0x5c0 [ 67.283925] __alloc_pages_nodemask+0x4fd/0x5c0 [ 67.284446] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 [ 67.285146] alloc_slab_page+0x2e/0x7a0 [ 67.285590] ? new_slab+0x22e/0x2b0 [ 67.285999] new_slab+0x276/0x2b0 [ 67.286402] ___slab_alloc+0x4ba/0x6d0 [ 67.286892] ? copy_process+0x256d/0x2f80 [ 67.287391] ? lock_downgrade+0x360/0x360 [ 67.287908] ? copy_process+0x256d/0x2f80 [ 67.288482] ? __slab_alloc.isra.0+0x4b/0x90 [ 67.289207] __slab_alloc.isra.0+0x4b/0x90 [ 67.289874] ? copy_process+0x256d/0x2f80 [ 67.290565] kmem_cache_alloc_node+0xb7/0x330 [ 67.291163] ? trace_hardirqs_on+0x1e/0x130 [ 67.291699] copy_process+0x256d/0x2f80 [ 67.292231] ? mark_lock+0x13f/0xc30 [ 67.292746] ? find_held_lock+0x85/0xa0 [ 67.293314] ? __cleanup_sighand+0x60/0x60 [ 67.293889] _do_fork+0xcf/0x840 [ 67.294354] ? copy_init_mm+0x20/0x20 [ 67.294856] ? lockdep_hardirqs_on_prepare+0x14c/0x240 [ 67.295530] ? _raw_spin_unlock_irq+0x24/0x50 [ 67.296036] ? trace_hardirqs_on+0x1e/0x130 [ 67.296529] ? preempt_count_sub+0x14/0xc0 [ 67.297010] ? lock_acquire+0x133/0x4e0 [ 67.297467] kernel_thread+0xa8/0xe0 [ 67.297886] ? legacy_clone_args_valid+0x30/0x30 [ 67.298429] ? kthread_create_on_node+0xd0/0xd0 [ 67.298966] ? do_raw_spin_unlock+0xa3/0x130 [ 67.299458] ? preempt_count_sub+0x14/0xc0 [ 67.299907] kthreadd+0x2be/0x340 [ 67.300290] ? kthread_create_on_cpu+0x120/0x120 [ 67.300775] ? lockdep_hardirqs_on_prepare+0x14c/0x240 [ 67.301324] ? _raw_spin_unlock_irq+0x24/0x50 [ 67.301771] ? trace_hardirqs_on+0x1e/0x130 [ 67.302206] ? kthread_create_on_cpu+0x120/0x120 [ 67.302685] ret_from_fork+0x1f/0x30 [ 67.303234] Mem-Info: [ 67.303485] active_anon:1210 inactive_anon:126 isolated_anon:0 [ 67.303485] active_file:5 inactive_file:12 isolated_file:0 [ 67.303485] unevictable:0 dirty:0 writeback:0 [ 67.303485] slab_reclaimable:11187 slab_unreclaimable:98423 [ 67.303485] mapped:12 shmem:137 pagetables:70 bounce:0 [ 67.303485] free:20722 free_pcp:1 free_cma:0 [ 67.307090] Node 0 active_anon:4840kB inactive_anon:504kB active_file:20kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:48kB dirty:0kB writeback:0kB shmem:548kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB all_unreclaimable? yes [ 67.309863] Node 0 DMA free:13708kB min:308kB low:384kB high:460kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:96kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB [ 67.312641] lowmem_reserve[]: 0 2925 3354 3354 [ 67.313081] Node 0 DMA32 free:60868kB min:58668kB low:73332kB high:87996kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129212kB managed:3001752kB mlocked:0kB kernel_stack:25824kB pagetables:240kB bounce:0kB free_pcp:248kB local_pcp:0kB free_cma:0kB [ 67.316022] lowmem_reserve[]: 0 0 428 428 [ 67.316560] Node 0 Normal free:8312kB min:8600kB low:10748kB high:12896kB reserved_highatomic:0KB active_anon:4916kB inactive_anon:504kB active_file:308kB inactive_file:32kB unevictable:0kB writepending:0kB present:1048576kB managed:439260kB mlocked:0kB kernel_stack:8192kB pagetables:40kB bounce:0kB free_pcp:392kB local_pcp:0kB free_cma:0kB [ 67.319987] lowmem_reserve[]: 0 0 0 0 [ 67.320421] Node 0 DMA: 1*4kB (U) 1*8kB (U) 2*16kB (UE) 1*32kB (U) 1*64kB (E) 2*128kB (UE) 2*256kB (UE) 1*512kB (E) 2*1024kB (UE) 3*2048kB (UME) 1*4096kB (M) = 13708kB [ 67.321913] Node 0 DMA32: 6*4kB (M) 26*8kB (UM) 29*16kB (UM) 11*32kB (UME) 9*64kB (UME) 10*128kB (UME) 6*256kB (UM) 7*512kB (ME) 4*1024kB (M) 2*2048kB (ME) 11*4096kB (M) = 61272kB [ 67.323562] Node 0 Normal: 488*4kB (UME) 251*8kB (UM) 86*16kB (UM) 37*32kB (UM) 18*64kB (UM) 6*128kB (M) 4*256kB (UM) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 9464kB [ 67.325773] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB [ 67.326999] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB [ 67.328287] 155 total pagecache pages [ 67.328836] 0 pages in swap cache [ 67.329365] Swap cache stats: add 0, delete 0, find 0/0 [ 67.330140] Free swap = 0kB [ 67.330596] Total swap = 0kB [ 67.331043] 1048445 pages RAM [ 67.331478] 0 pages HighMem/MovableOnly [ 67.332080] 184215 pages reserved [ 67.332617] 0 pages cma reserved [ 67.333114] 0 pages hwpoisoned [ 67.333816] Unreclaimable slab info: [ 67.334439] Name Used Total [ 67.335297] 9p-fcall-cache 297KB 445KB [ 67.336094] 9p-fcall-cache 49KB 49KB [ 67.336933] 9p-fcall-cache 123KB 272KB [ 67.337751] 9p-fcall-cache 445KB 495KB [ 67.338572] p9_req_t 16KB 16KB [ 67.339391] fib6_nodes 4KB 4KB [ 67.340229] RAWv6 31KB 31KB [ 67.341033] mqueue_inode_cache 31KB 31KB [ 67.341997] ext4_bio_post_read_ctx 15KB 15KB [ 67.342835] bio-2 7KB 7KB [ 67.343695] UNIX 372KB 372KB [ 67.344560] tcp_bind_bucket 4KB 4KB [ 67.345368] ip_fib_trie 4KB 4KB [ 67.346190] ip_fib_alias 3KB 3KB [ 67.346997] ip_dst_cache 4KB 4KB [ 67.347819] RAW 31KB 31KB [ 67.348668] UDP 121KB 121KB [ 67.349856] tw_sock_TCP 7KB 7KB [ 67.350723] request_sock_TCP 7KB 7KB [ 67.351567] TCP 58KB 58KB [ 67.352412] hugetlbfs_inode_cache 31KB 31KB [ 67.353319] bio-1 15KB 15KB [ 67.354116] eventpoll_pwq 23KB 23KB [ 67.354919] eventpoll_epi 35KB 35KB [ 67.355735] inotify_inode_mark 3KB 3KB [ 67.356618] request_queue 62KB 62KB [ 67.357680] blkdev_ioc 7KB 7KB [ 67.358569] bio-0 20KB 20KB [ 67.359520] biovec-max 327KB 327KB [ 67.360396] skbuff_fclone_cache 15KB 15KB [ 67.361277] skbuff_head_cache 281KB 312KB [ 67.362116] file_lock_cache 31KB 31KB [ 67.362967] file_lock_ctx 15KB 15KB [ 67.363597] fsnotify_mark_connector 4KB 4KB [ 67.364279] task_delay_info 455KB 455KB [ 67.364832] proc_dir_entry 125KB 125KB [ 67.365663] pde_opener 59KB 59KB [ 67.366265] seq_file 210KB 241KB [ 67.366805] sigqueue 19KB 19KB [ 67.367386] shmem_inode_cache 795KB 795KB [ 67.367909] kernfs_node_cache 2565KB 2565KB [ 67.368489] mnt_cache 31KB 31KB [ 67.369014] filp 11820KB 11820KB [ 67.369585] names_cache 327KB 476KB [ 67.370113] key_jar 15KB 15KB [ 67.370664] nsproxy 3KB 3KB [ 67.371230] vm_area_struct 2870KB 3100KB [ 67.371754] mm_struct 831KB 1154KB [ 67.372337] fs_cache 176KB 212KB [ 67.372862] files_cache 843KB 956KB [ 67.373625] signal_cache 2809KB 2809KB [ 67.374210] sighand_cache 2615KB 2615KB [ 67.374750] task_struct 9207KB 9207KB [ 67.375335] cred_jar 392KB 420KB [ 67.375856] anon_vma_chain 1058KB 1291KB [ 67.376437] anon_vma 144KB 160KB [ 67.376952] pid 609KB 640KB [ 67.377519] Acpi-Operand 265KB 308KB [ 67.378063] Acpi-ParseExt 47KB 47KB [ 67.378645] Acpi-Parse 189KB 205KB [ 67.379216] Acpi-State 200KB 216KB [ 67.379747] Acpi-Namespace 24KB 24KB [ 67.380345] numa_policy 3KB 3KB [ 67.380870] trace_event_file 151KB 151KB [ 67.381649] ftrace_event_field 196KB 196KB [ 67.382199] pool_workqueue 16KB 16KB [ 67.382722] vmap_area 567KB 567KB [ 67.383261] page->ptl 384KB 429KB [ 67.383781] kmemleak_scan_area 286KB 286KB [ 67.384527] kmemleak_object 162939KB 167943KB [ 67.385080] kmalloc-8k 21840KB 21840KB [ 67.385618] kmalloc-4k 25736KB 25736KB [ 67.386158] kmalloc-2k 15684KB 15684KB [ 67.386679] kmalloc-1k 44936KB 44936KB [ 67.387208] kmalloc-512 4192KB 4192KB [ 67.387826] kmalloc-256 1184KB 1184KB [ 67.388514] kmalloc-192 5032KB 5032KB [ 67.389397] kmalloc-128 356KB 356KB [ 67.390100] kmalloc-96 145KB 156KB [ 67.390775] kmalloc-64 1052KB 1052KB [ 67.391489] kmalloc-32 233KB 244KB [ 67.392261] kmalloc-16 108KB 108KB [ 67.392964] kmalloc-8 440KB 533KB [ 67.393657] kmem_cache_node 43KB 43KB [ 67.394424] kmem_cache 140KB 140KB [ 67.395296] Tasks state (memory values in pages): [ 67.395889] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name [ 67.397031] [ 103] 0 103 7766 1042 81920 0 -1000 systemd-udevd [ 67.398411] Out of memory and no killable processes... [ 67.399203] Kernel panic - not syncing: System is deadlocked on memory [ 67.400146] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 [ 67.401254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ 67.403154] Call Trace: [ 67.403536] dump_stack+0x9e/0xe0 [ 67.404021] panic+0x1ab/0x3ae [ 67.404497] ? __warn_printk+0xf3/0xf3 [ 67.405075] ? __rcu_read_unlock+0x58/0x250 [ 67.405705] ? out_of_memory.cold+0x2d/0xbb [ 67.406272] ? out_of_memory.cold+0x1f/0xbb [ 67.406910] out_of_memory.cold+0x45/0xbb [ 67.407540] ? oom_killer_disable+0x210/0x210 [ 67.408225] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 [ 67.409178] ? warn_alloc+0x120/0x120 [ 67.409849] ? __alloc_pages_nodemask+0x30f/0x5c0 [ 67.410722] __alloc_pages_nodemask+0x4fd/0x5c0 [ 67.411533] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 [ 67.412641] alloc_slab_page+0x2e/0x7a0 [ 67.413345] ? new_slab+0x22e/0x2b0 [ 67.413883] new_slab+0x276/0x2b0 [ 67.414534] ___slab_alloc+0x4ba/0x6d0 [ 67.415221] ? copy_process+0x256d/0x2f80 [ 67.415930] ? lock_downgrade+0x360/0x360 [ 67.416659] ? copy_process+0x256d/0x2f80 [ 67.417390] ? __slab_alloc.isra.0+0x4b/0x90 [ 67.418171] __slab_alloc.isra.0+0x4b/0x90 [ 67.418903] ? copy_process+0x256d/0x2f80 [ 67.419600] kmem_cache_alloc_node+0xb7/0x330 [ 67.420339] ? trace_hardirqs_on+0x1e/0x130 [ 67.421078] copy_process+0x256d/0x2f80 [ 67.421722] ? mark_lock+0x13f/0xc30 [ 67.422284] ? find_held_lock+0x85/0xa0 [ 67.422838] ? __cleanup_sighand+0x60/0x60 [ 67.423515] _do_fork+0xcf/0x840 [ 67.423978] ? copy_init_mm+0x20/0x20 [ 67.424496] ? lockdep_hardirqs_on_prepare+0x14c/0x240 [ 67.425321] ? _raw_spin_unlock_irq+0x24/0x50 [ 67.426018] ? trace_hardirqs_on+0x1e/0x130 [ 67.426702] ? preempt_count_sub+0x14/0xc0 [ 67.427328] ? lock_acquire+0x133/0x4e0 [ 67.427938] kernel_thread+0xa8/0xe0 [ 67.428523] ? legacy_clone_args_valid+0x30/0x30 [ 67.429283] ? kthread_create_on_node+0xd0/0xd0 [ 67.430026] ? do_raw_spin_unlock+0xa3/0x130 [ 67.430708] ? preempt_count_sub+0x14/0xc0 [ 67.431402] kthreadd+0x2be/0x340 [ 67.431958] ? kthread_create_on_cpu+0x120/0x120 [ 67.432726] ? lockdep_hardirqs_on_prepare+0x14c/0x240 [ 67.433575] ? _raw_spin_unlock_irq+0x24/0x50 [ 67.434288] ? trace_hardirqs_on+0x1e/0x130 [ 67.434976] ? kthread_create_on_cpu+0x120/0x120 [ 67.435746] ret_from_fork+0x1f/0x30 [ 67.436548] Kernel Offset: disabled
[...] > This started showing up with when running ./test_progs from recent > bpf-next (bfdfa51702de). Any chance it is related? > > [ 2950.440613] ============================================= > > [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 seconds. > [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3a516b #814 > [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 3073.293021] cpumap/0/map:26 D 0 536 2 0x00004000 > [ 3073.295755] Call Trace: > [ 3073.297143] __schedule+0x5ad/0xf10 > [ 3073.299032] ? pci_mmcfg_check_reserved+0xd0/0xd0 > [ 3073.301416] ? static_obj+0x31/0x80 > [ 3073.303277] ? mark_held_locks+0x24/0x90 > [ 3073.305313] ? cpu_map_update_elem+0x6d0/0x6d0 > [ 3073.307544] schedule+0x6f/0x160 > [ 3073.309282] schedule_preempt_disabled+0x14/0x20 > [ 3073.311593] kthread+0x175/0x240 > [ 3073.313299] ? kthread_create_on_node+0xd0/0xd0 > [ 3073.315106] ret_from_fork+0x1f/0x30 > [ 3073.316365] > Showing all locks held in the system: > [ 3073.318423] 1 lock held by khungtaskd/33: > [ 3073.319642] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 > > [ 3073.322249] ============================================= Hi Jakub, can you please provide more info? can you please identify the test that trigger the issue? I run test_progs with bpf-next master branch and it works fine for me. I run the tests in a vm with 4 vcpus and 4G of memory. Regards, Lorenzo
> On Fri, 17 Jul 2020 12:00:13 +0200 > Jakub Sitnicki <jakub@cloudflare.com> wrote: > [...] > 'test_maps' looks sad :-( Not sure if related. I trigger this issue even switching back to commit: commit 59632b220f2d61df274ed3a14a204e941051fdad Author: Randy Dunlap <rdunlap@infradead.org> Date: Wed Jul 15 09:42:46 2020 -0700 net: ipv6: drop duplicate word in comment [ 244.327081] [ 8645] 0 8645 760 31 40960 0 0 test_maps [ 244.327148] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),global_oom,task_memcg=/system.slice/polkit.service,task=polkitd,pid=211,uid=997 [ 244.327264] Out of memory: Killed process 211 (polkitd) total-vm:1541300kB, anon-rss:7516kB, file-rss:0kB, shmem-rss:0kB, UID:997 pgtables:180kB oom_score_adj:0 [ 244.333067] test_maps invoked oom-killer: gfp_mask=0x140cc0(GFP_USER|__GFP_COMP), order=0, oom_score_adj=0 [ 244.333141] CPU: 0 PID: 8632 Comm: test_maps Not tainted 5.8.0-rc4-kvm+ #196 [ 244.333196] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014 [ 244.333270] Call Trace: [ 244.333301] dump_stack+0x57/0x70 [ 244.333334] dump_header+0x4a/0x1d7 [ 244.333367] oom_kill_process.cold+0xb/0x10 [ 244.333398] out_of_memory+0x1ca/0x280 [ 244.333428] __alloc_pages_slowpath.constprop.0+0x946/0xc00 [ 244.333489] __alloc_pages_nodemask+0x1f7/0x230 [ 244.333529] alloc_slab_page+0x157/0x2b0 [ 244.333556] allocate_slab+0x2da/0x320 [ 244.333585] ___slab_alloc.constprop.0+0x283/0x4f0 [ 244.333622] ? update_load_avg+0x5b/0x520 [ 244.333649] ? htab_map_alloc+0x3a/0x480 [ 244.333677] ? set_next_entity+0x60/0x80 [ 244.333705] ? pick_next_task_fair+0x25f/0x2c0 [ 244.333742] ? kvm_sched_clock_read+0xd/0x20 [ 244.333776] kmem_cache_alloc_trace+0x1ca/0x1e0 [ 244.333811] ? htab_map_alloc+0x3a/0x480 [ 244.333839] htab_map_alloc+0x3a/0x480 [ 244.333869] __do_sys_bpf+0x2a4/0x1c30 [ 244.333897] ? hrtimer_nanosleep+0xb8/0x190 [ 244.333926] do_syscall_64+0x45/0x240 [ 244.333953] ? exc_page_fault+0x1b4/0x4a0 [ 244.333993] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 244.334037] RIP: 0033:0x7fe678a5b43d [ 244.334072] Code: Bad RIP value. [ 244.334103] RSP: 002b:00007ffed0c408a8 EFLAGS: 00000202 ORIG_RAX: 0000000000000141 [ 244.334166] RAX: ffffffffffffffda RBX: 0000000000000013 RCX: 00007fe678a5b43d [ 244.334219] RDX: 0000000000000078 RSI: 00007ffed0c408e0 RDI: 0000000000000000 [ 244.334268] RBP: 00007ffed0c408c0 R08: 00007ffed0c408e0 R09: 00007ffed0c408e0 [ 244.334326] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000001 [ 244.334393] R13: 0000000000000002 R14: 0000000000000054 R15: 0000000000000000 [ 244.334457] Mem-Info: [ 244.334488] active_anon:13749 inactive_anon:81 isolated_anon:0 active_file:0 inactive_file:2 isolated_file:0 unevictable:0 dirty:0 writeback:0 slab_reclaimable:4723 slab_unreclaimable:25886 mapped:38 shmem:125 pagetables:1432 bounce:0 free:25932 free_pcp:676 free_cma:0 [ 244.334684] Node 0 active_anon:54996kB inactive_anon:324kB active_file:0kB inactive_file:8kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:152kB dirty:0kB writeback:0kB shmem:500kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 4096kB writeback_tmp:0kB all_unreclaimable? no [ 244.334839] DMA free:8528kB min:704kB low:880kB high:1056kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:16kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB [ 244.334991] lowmem_reserve[]: 0 1972 1972 1972 [ 244.335029] DMA32 free:95200kB min:97596kB low:119944kB high:142292kB reserved_highatomic:4096KB active_anon:54996kB inactive_anon:324kB active_file:100kB inactive_file:492kB unevictable:0kB writepending:0kB present:2080624kB managed:2024508kB mlocked:0kB kernel_stack:6496kB pagetables:5728kB bounce:0kB free_pcp:2704kB local_pcp:1468kB free_cma:0kB [ 244.335202] lowmem_reserve[]: 0 0 0 0 [ 244.335230] DMA: 6*4kB (U) 1*8kB (U) 1*16kB (U) 1*32kB (U) 0*64kB 0*128kB 1*256kB (U) 0*512kB 0*1024kB 0*2048kB 2*4096kB (ME) = 8528kB [ 244.335313] DMA32: 1607*4kB (MEH) 1383*8kB (UMEH) 913*16kB (UMH) 556*32kB (UMEH) 368*64kB (MEH) 82*128kB (MH) 27*256kB (MH) 0*512kB 0*1024kB 2*2048kB (UM) 0*4096kB = 94948kB [ 244.335415] 159 total pagecache pages [ 244.335444] 0 pages in swap cache [ 244.335472] Swap cache stats: add 0, delete 0, find 0/0 [ 244.335503] Free swap = 0kB [ 244.335530] Total swap = 0kB [ 244.335559] 524154 pages RAM [ 244.335589] 0 pages HighMem/MovableOnly [ 244.335618] 14050 pages reserved [ 244.335645] Unreclaimable slab info: [ 244.335672] Name Used Total [ 244.335760] 9p-fcall-cache 32KB 32KB [ 244.335808] p9_req_t 3KB 3KB [ 244.335842] PINGv6 31KB 31KB [ 244.335880] RAWv6 78KB 78KB [ 244.335915] UDPv6 30KB 30KB [ 244.335951] tw_sock_TCPv6 3KB 3KB [ 244.335987] request_sock_TCPv6 3KB 3KB [ 244.336022] TCPv6 30KB 30KB Increasing vm memory from 2G to 4G fixes the issue for me. Can you please double check? Regards, Lorenzo > > bash-5.0# ./test_maps > Fork 1024 tasks to 'test_update_delete' > Fork 1024 tasks to 'test_update_delete' > Fork 100 tasks to 'test_hashmap' > Fork 100 tasks to 'test_hashmap_percpu' > Fork 100 tasks to 'test_hashmap_sizes' > [ 66.961150] test_maps invoked oom-killer: gfp_mask=0x100cca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0 > [ 66.962490] CPU: 3 PID: 3263 Comm: test_maps Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 > [ 66.963617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 > [ 66.965958] Call Trace: > [ 66.966404] dump_stack+0x9e/0xe0 > [ 66.966978] dump_header+0x89/0x49a > [ 66.967624] oom_kill_process.cold+0xb/0x10 > [ 66.968379] out_of_memory+0x1b1/0x820 > [ 66.969060] ? oom_killer_disable+0x210/0x210 > [ 66.969833] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 > [ 66.970852] ? warn_alloc+0x120/0x120 > [ 66.971508] ? __alloc_pages_nodemask+0x30f/0x5c0 > [ 66.972237] __alloc_pages_nodemask+0x4fd/0x5c0 > [ 66.972863] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 > [ 66.973681] ? find_held_lock+0x85/0xa0 > [ 66.974223] ? lock_downgrade+0x360/0x360 > [ 66.974760] ? policy_nodemask+0x19/0x90 > [ 66.975266] ? policy_node+0x56/0x60 > [ 66.975719] pagecache_get_page+0xf7/0x360 > [ 66.976259] filemap_fault+0xe4a/0xfe0 > [ 66.976743] ? read_cache_page_gfp+0x20/0x20 > [ 66.977274] ? find_held_lock+0x85/0xa0 > [ 66.977792] ? filemap_page_mkwrite+0x140/0x140 > [ 66.978383] __do_fault+0x6a/0x1e0 > [ 66.978789] handle_mm_fault+0x16eb/0x1fb0 > [ 66.979319] ? copy_page_range+0xf80/0xf80 > [ 66.979755] ? vmacache_find+0xba/0x100 > [ 66.980166] do_user_addr_fault+0x2ce/0x5ed > [ 66.980625] exc_page_fault+0x5e/0xc0 > [ 66.981005] ? asm_exc_page_fault+0x8/0x30 > [ 66.981445] asm_exc_page_fault+0x1e/0x30 > [ 66.981860] RIP: 0033:0x7f33d40901bd > [ 66.982248] Code: Bad RIP value. > [ 66.982579] RSP: 002b:00007ffe84e1dd18 EFLAGS: 00010202 > [ 66.983143] RAX: fffffffffffffff4 RBX: 0000000000000002 RCX: 00007f33d40901bd > [ 66.984038] RDX: 0000000000000078 RSI: 00007ffe84e1dd50 RDI: 0000000000000000 > [ 66.984831] RBP: 00007ffe84e1dd30 R08: 00007ffe84e1dd50 R09: 00007ffe84e1dd50 > [ 66.985619] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000020000 > [ 66.986399] R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000060 > [ 66.987656] Mem-Info: > [ 66.987924] active_anon:1424 inactive_anon:126 isolated_anon:0 > [ 66.987924] active_file:53 inactive_file:33 isolated_file:0 > [ 66.987924] unevictable:0 dirty:0 writeback:0 > [ 66.987924] slab_reclaimable:11120 slab_unreclaimable:98031 > [ 66.987924] mapped:88 shmem:137 pagetables:120 bounce:0 > [ 66.987924] free:21175 free_pcp:725 free_cma:0 > [ 66.993308] Node 0 active_anon:5696kB inactive_anon:504kB active_file:212kB inactive_file:132kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:352kB dirty:0kB writeback:0kB shmem:548kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB all_unreclaimable? yes > [ 66.997665] Node 0 DMA free:13708kB min:308kB low:384kB high:460kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:96kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB > [ 67.002330] lowmem_reserve[]: 0 2925 3354 3354 > [ 67.003090] Node 0 DMA32 free:60008kB min:58668kB low:73332kB high:87996kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129212kB managed:3001752kB mlocked:0kB kernel_stack:25536kB pagetables:292kB bounce:0kB free_pcp:844kB local_pcp:248kB free_cma:0kB > [ 67.008157] lowmem_reserve[]: 0 0 428 428 > [ 67.008843] Node 0 Normal free:9528kB min:8600kB low:10748kB high:12896kB reserved_highatomic:2048KB active_anon:5404kB inactive_anon:504kB active_file:336kB inactive_file:0kB unevictable:0kB writepending:0kB present:1048576kB managed:439260kB mlocked:0kB kernel_stack:5824kB pagetables:128kB bounce:0kB free_pcp:1596kB local_pcp:660kB free_cma:0kB > [ 67.014007] lowmem_reserve[]: 0 0 0 0 > [ 67.014673] Node 0 DMA: 1*4kB (U) 1*8kB (U) 2*16kB (UE) 1*32kB (U) 1*64kB (E) 2*128kB (UE) 2*256kB (UE) 1*512kB (E) 2*1024kB (UE) 3*2048kB (UME) 1*4096kB (M) = 13708kB > [ 67.016793] Node 0 DMA32: 8*4kB (UM) 5*8kB (UM) 4*16kB (UME) 8*32kB (UME) 7*64kB (ME) 8*128kB (UME) 6*256kB (UM) 8*512kB (ME) 3*1024kB (M) 2*2048kB (ME) 11*4096kB (M) = 59720kB > [ 67.018915] Node 0 Normal: 256*4kB (UME) 149*8kB (UM) 89*16kB (UM) 41*32kB (UM) 20*64kB (UMH) 8*128kB (UM) 2*256kB (MH) 1*512kB (H) 1*1024kB (H) 0*2048kB 0*4096kB = 9304kB > [ 67.020673] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB > [ 67.021811] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB > [ 67.022768] 184 total pagecache pages > [ 67.023418] 0 pages in swap cache > [ 67.023912] Swap cache stats: add 0, delete 0, find 0/0 > [ 67.024726] Free swap = 0kB > [ 67.025150] Total swap = 0kB > [ 67.025530] 1048445 pages RAM > [ 67.025865] 0 pages HighMem/MovableOnly > [ 67.026510] 184215 pages reserved > [ 67.027002] 0 pages cma reserved > [ 67.027542] 0 pages hwpoisoned > [ 67.027928] Unreclaimable slab info: > [ 67.028500] Name Used Total > [ 67.029057] 9p-fcall-cache 297KB 445KB > [ 67.029793] 9p-fcall-cache 49KB 49KB > [ 67.030375] 9p-fcall-cache 123KB 272KB > [ 67.030897] 9p-fcall-cache 346KB 495KB > [ 67.031539] p9_req_t 16KB 16KB > [ 67.032326] fib6_nodes 4KB 4KB > [ 67.032950] RAWv6 31KB 31KB > [ 67.033960] mqueue_inode_cache 31KB 31KB > [ 67.034708] ext4_bio_post_read_ctx 15KB 15KB > [ 67.035647] bio-2 7KB 7KB > [ 67.036471] UNIX 372KB 372KB > [ 67.037769] tcp_bind_bucket 4KB 4KB > [ 67.038701] ip_fib_trie 4KB 4KB > [ 67.039496] ip_fib_alias 3KB 3KB > [ 67.040414] ip_dst_cache 4KB 4KB > [ 67.041365] RAW 31KB 31KB > [ 67.042341] UDP 121KB 121KB > [ 67.043540] tw_sock_TCP 7KB 7KB > [ 67.044491] request_sock_TCP 7KB 7KB > [ 67.045447] TCP 58KB 58KB > [ 67.046445] hugetlbfs_inode_cache 31KB 31KB > [ 67.047443] bio-1 15KB 15KB > [ 67.048375] eventpoll_pwq 23KB 23KB > [ 67.049388] eventpoll_epi 35KB 35KB > [ 67.050361] inotify_inode_mark 3KB 3KB > [ 67.051399] request_queue 62KB 62KB > [ 67.052563] blkdev_ioc 7KB 7KB > [ 67.053623] bio-0 20KB 20KB > [ 67.054603] biovec-max 327KB 327KB > [ 67.055593] skbuff_fclone_cache 15KB 15KB > [ 67.056627] skbuff_head_cache 281KB 312KB > [ 67.057868] file_lock_cache 31KB 31KB > [ 67.058878] file_lock_ctx 15KB 15KB > [ 67.059874] fsnotify_mark_connector 4KB 4KB > [ 67.060957] task_delay_info 451KB 451KB > [ 67.061644] proc_dir_entry 125KB 125KB > [ 67.062404] pde_opener 59KB 59KB > [ 67.063696] seq_file 210KB 241KB > [ 67.064759] sigqueue 19KB 19KB > [ 67.065763] shmem_inode_cache 795KB 795KB > [ 67.066778] kernfs_node_cache 2565KB 2565KB > [ 67.067762] mnt_cache 31KB 31KB > [ 67.068798] filp 11820KB 11820KB > [ 67.069807] names_cache 327KB 476KB > [ 67.070795] key_jar 15KB 15KB > [ 67.071787] nsproxy 3KB 3KB > [ 67.072802] vm_area_struct 3236KB 3400KB > [ 67.073773] mm_struct 870KB 1154KB > [ 67.074787] fs_cache 232KB 264KB > [ 67.076008] files_cache 860KB 972KB > [ 67.076969] signal_cache 2626KB 2686KB > [ 67.077911] sighand_cache 2370KB 2405KB > [ 67.078963] task_struct 8564KB 8564KB > [ 67.080472] cred_jar 392KB 420KB > [ 67.081767] anon_vma_chain 1191KB 1413KB > [ 67.082736] anon_vma 200KB 220KB > [ 67.083805] pid 593KB 640KB > [ 67.084733] Acpi-Operand 265KB 308KB > [ 67.085598] Acpi-ParseExt 47KB 47KB > [ 67.086504] Acpi-Parse 189KB 205KB > [ 67.091509] Acpi-State 200KB 216KB > [ 67.092511] Acpi-Namespace 24KB 24KB > [ 67.093388] numa_policy 3KB 3KB > [ 67.094249] trace_event_file 151KB 151KB > [ 67.095076] ftrace_event_field 196KB 196KB > [ 67.099230] pool_workqueue 16KB 16KB > [ 67.100094] vmap_area 567KB 567KB > [ 67.105224] page->ptl 385KB 433KB > [ 67.106079] kmemleak_scan_area 286KB 286KB > [ 67.107190] kmemleak_object 163919KB 168558KB > [ 67.108081] kmalloc-8k 21840KB 21840KB > [ 67.108932] kmalloc-4k 24592KB 24592KB > [ 67.114003] kmalloc-2k 15684KB 15684KB > [ 67.114896] kmalloc-1k 44936KB 44936KB > [ 67.121018] kmalloc-512 4192KB 4192KB > [ 67.122212] kmalloc-256 1128KB 1128KB > [ 67.123089] kmalloc-192 5008KB 5008KB > [ 67.128978] kmalloc-128 356KB 356KB > [ 67.129877] kmalloc-96 145KB 156KB > [ 67.132262] kmalloc-64 1032KB 1032KB > [ 67.133085] kmalloc-32 233KB 244KB > [ 67.138993] kmalloc-16 108KB 108KB > [ 67.139847] kmalloc-8 440KB 533KB > [ 67.142221] kmem_cache_node 43KB 43KB > [ 67.143038] kmem_cache 140KB 140KB > [ 67.149977] Tasks state (memory values in pages): > [ 67.150743] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name > [ 67.153263] [ 103] 0 103 7766 1042 81920 0 -1000 systemd-udevd > [ 67.157980] [ 194] 0 194 1032 136 40960 0 0 bash > [ 67.161986] [ 195] 0 195 758 40 45056 0 0 test_maps > [ 67.167074] [ 3178] 0 3178 758 39 45056 0 0 test_maps > [ 67.170572] [ 3186] 0 3186 758 39 45056 0 0 test_maps > [ 67.172052] [ 3205] 0 3205 758 39 45056 0 0 test_maps > [ 67.177580] [ 3213] 0 3213 758 39 45056 0 0 test_maps > [ 67.179026] [ 3221] 0 3221 758 39 45056 0 0 test_maps > [ 67.184143] [ 3222] 0 3222 758 39 45056 0 0 test_maps > [ 67.187571] [ 3230] 0 3230 758 39 45056 0 0 test_maps > [ 67.189053] [ 3241] 0 3241 758 39 45056 0 0 test_maps > [ 67.194580] [ 3243] 0 3243 758 39 45056 0 0 test_maps > [ 67.196058] [ 3250] 0 3250 758 39 45056 0 0 test_maps > [ 67.201124] [ 3263] 0 3263 758 39 45056 0 0 test_maps > [ 67.206581] [ 3298] 0 3298 758 39 45056 0 0 test_maps > [ 67.210563] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/,task=bash,pid=194,uid=0 > [ 67.214666] Out of memory: Killed process 194 (bash) total-vm:4128kB, anon-rss:544kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:40kB oom_score_adj:0 > [ 67.226601] oom_reaper: reaped process 3298 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.228355] oom_reaper: reaped process 3178 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.234148] oom_reaper: reaped process 3222 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.236873] oom_reaper: reaped process 3213 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.239028] oom_reaper: reaped process 3186 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.268146] oom_reaper: reaped process 3221 (test_maps), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB > [ 67.275959] kthreadd invoked oom-killer: gfp_mask=0x40cc0(GFP_KERNEL|__GFP_COMP), order=1, oom_score_adj=0 > [ 67.277227] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 > [ 67.278278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 > [ 67.279895] Call Trace: > [ 67.280250] dump_stack+0x9e/0xe0 > [ 67.280674] dump_header+0x89/0x49a > [ 67.281113] out_of_memory.cold+0xa/0xbb > [ 67.281608] ? oom_killer_disable+0x210/0x210 > [ 67.282157] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 > [ 67.282894] ? warn_alloc+0x120/0x120 > [ 67.283377] ? __alloc_pages_nodemask+0x30f/0x5c0 > [ 67.283925] __alloc_pages_nodemask+0x4fd/0x5c0 > [ 67.284446] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 > [ 67.285146] alloc_slab_page+0x2e/0x7a0 > [ 67.285590] ? new_slab+0x22e/0x2b0 > [ 67.285999] new_slab+0x276/0x2b0 > [ 67.286402] ___slab_alloc+0x4ba/0x6d0 > [ 67.286892] ? copy_process+0x256d/0x2f80 > [ 67.287391] ? lock_downgrade+0x360/0x360 > [ 67.287908] ? copy_process+0x256d/0x2f80 > [ 67.288482] ? __slab_alloc.isra.0+0x4b/0x90 > [ 67.289207] __slab_alloc.isra.0+0x4b/0x90 > [ 67.289874] ? copy_process+0x256d/0x2f80 > [ 67.290565] kmem_cache_alloc_node+0xb7/0x330 > [ 67.291163] ? trace_hardirqs_on+0x1e/0x130 > [ 67.291699] copy_process+0x256d/0x2f80 > [ 67.292231] ? mark_lock+0x13f/0xc30 > [ 67.292746] ? find_held_lock+0x85/0xa0 > [ 67.293314] ? __cleanup_sighand+0x60/0x60 > [ 67.293889] _do_fork+0xcf/0x840 > [ 67.294354] ? copy_init_mm+0x20/0x20 > [ 67.294856] ? lockdep_hardirqs_on_prepare+0x14c/0x240 > [ 67.295530] ? _raw_spin_unlock_irq+0x24/0x50 > [ 67.296036] ? trace_hardirqs_on+0x1e/0x130 > [ 67.296529] ? preempt_count_sub+0x14/0xc0 > [ 67.297010] ? lock_acquire+0x133/0x4e0 > [ 67.297467] kernel_thread+0xa8/0xe0 > [ 67.297886] ? legacy_clone_args_valid+0x30/0x30 > [ 67.298429] ? kthread_create_on_node+0xd0/0xd0 > [ 67.298966] ? do_raw_spin_unlock+0xa3/0x130 > [ 67.299458] ? preempt_count_sub+0x14/0xc0 > [ 67.299907] kthreadd+0x2be/0x340 > [ 67.300290] ? kthread_create_on_cpu+0x120/0x120 > [ 67.300775] ? lockdep_hardirqs_on_prepare+0x14c/0x240 > [ 67.301324] ? _raw_spin_unlock_irq+0x24/0x50 > [ 67.301771] ? trace_hardirqs_on+0x1e/0x130 > [ 67.302206] ? kthread_create_on_cpu+0x120/0x120 > [ 67.302685] ret_from_fork+0x1f/0x30 > [ 67.303234] Mem-Info: > [ 67.303485] active_anon:1210 inactive_anon:126 isolated_anon:0 > [ 67.303485] active_file:5 inactive_file:12 isolated_file:0 > [ 67.303485] unevictable:0 dirty:0 writeback:0 > [ 67.303485] slab_reclaimable:11187 slab_unreclaimable:98423 > [ 67.303485] mapped:12 shmem:137 pagetables:70 bounce:0 > [ 67.303485] free:20722 free_pcp:1 free_cma:0 > [ 67.307090] Node 0 active_anon:4840kB inactive_anon:504kB active_file:20kB inactive_file:48kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:48kB dirty:0kB writeback:0kB shmem:548kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB all_unreclaimable? yes > [ 67.309863] Node 0 DMA free:13708kB min:308kB low:384kB high:460kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:96kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB > [ 67.312641] lowmem_reserve[]: 0 2925 3354 3354 > [ 67.313081] Node 0 DMA32 free:60868kB min:58668kB low:73332kB high:87996kB reserved_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129212kB managed:3001752kB mlocked:0kB kernel_stack:25824kB pagetables:240kB bounce:0kB free_pcp:248kB local_pcp:0kB free_cma:0kB > [ 67.316022] lowmem_reserve[]: 0 0 428 428 > [ 67.316560] Node 0 Normal free:8312kB min:8600kB low:10748kB high:12896kB reserved_highatomic:0KB active_anon:4916kB inactive_anon:504kB active_file:308kB inactive_file:32kB unevictable:0kB writepending:0kB present:1048576kB managed:439260kB mlocked:0kB kernel_stack:8192kB pagetables:40kB bounce:0kB free_pcp:392kB local_pcp:0kB free_cma:0kB > [ 67.319987] lowmem_reserve[]: 0 0 0 0 > [ 67.320421] Node 0 DMA: 1*4kB (U) 1*8kB (U) 2*16kB (UE) 1*32kB (U) 1*64kB (E) 2*128kB (UE) 2*256kB (UE) 1*512kB (E) 2*1024kB (UE) 3*2048kB (UME) 1*4096kB (M) = 13708kB > [ 67.321913] Node 0 DMA32: 6*4kB (M) 26*8kB (UM) 29*16kB (UM) 11*32kB (UME) 9*64kB (UME) 10*128kB (UME) 6*256kB (UM) 7*512kB (ME) 4*1024kB (M) 2*2048kB (ME) 11*4096kB (M) = 61272kB > [ 67.323562] Node 0 Normal: 488*4kB (UME) 251*8kB (UM) 86*16kB (UM) 37*32kB (UM) 18*64kB (UM) 6*128kB (M) 4*256kB (UM) 0*512kB 0*1024kB 0*2048kB 0*4096kB = 9464kB > [ 67.325773] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB > [ 67.326999] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB > [ 67.328287] 155 total pagecache pages > [ 67.328836] 0 pages in swap cache > [ 67.329365] Swap cache stats: add 0, delete 0, find 0/0 > [ 67.330140] Free swap = 0kB > [ 67.330596] Total swap = 0kB > [ 67.331043] 1048445 pages RAM > [ 67.331478] 0 pages HighMem/MovableOnly > [ 67.332080] 184215 pages reserved > [ 67.332617] 0 pages cma reserved > [ 67.333114] 0 pages hwpoisoned > [ 67.333816] Unreclaimable slab info: > [ 67.334439] Name Used Total > [ 67.335297] 9p-fcall-cache 297KB 445KB > [ 67.336094] 9p-fcall-cache 49KB 49KB > [ 67.336933] 9p-fcall-cache 123KB 272KB > [ 67.337751] 9p-fcall-cache 445KB 495KB > [ 67.338572] p9_req_t 16KB 16KB > [ 67.339391] fib6_nodes 4KB 4KB > [ 67.340229] RAWv6 31KB 31KB > [ 67.341033] mqueue_inode_cache 31KB 31KB > [ 67.341997] ext4_bio_post_read_ctx 15KB 15KB > [ 67.342835] bio-2 7KB 7KB > [ 67.343695] UNIX 372KB 372KB > [ 67.344560] tcp_bind_bucket 4KB 4KB > [ 67.345368] ip_fib_trie 4KB 4KB > [ 67.346190] ip_fib_alias 3KB 3KB > [ 67.346997] ip_dst_cache 4KB 4KB > [ 67.347819] RAW 31KB 31KB > [ 67.348668] UDP 121KB 121KB > [ 67.349856] tw_sock_TCP 7KB 7KB > [ 67.350723] request_sock_TCP 7KB 7KB > [ 67.351567] TCP 58KB 58KB > [ 67.352412] hugetlbfs_inode_cache 31KB 31KB > [ 67.353319] bio-1 15KB 15KB > [ 67.354116] eventpoll_pwq 23KB 23KB > [ 67.354919] eventpoll_epi 35KB 35KB > [ 67.355735] inotify_inode_mark 3KB 3KB > [ 67.356618] request_queue 62KB 62KB > [ 67.357680] blkdev_ioc 7KB 7KB > [ 67.358569] bio-0 20KB 20KB > [ 67.359520] biovec-max 327KB 327KB > [ 67.360396] skbuff_fclone_cache 15KB 15KB > [ 67.361277] skbuff_head_cache 281KB 312KB > [ 67.362116] file_lock_cache 31KB 31KB > [ 67.362967] file_lock_ctx 15KB 15KB > [ 67.363597] fsnotify_mark_connector 4KB 4KB > [ 67.364279] task_delay_info 455KB 455KB > [ 67.364832] proc_dir_entry 125KB 125KB > [ 67.365663] pde_opener 59KB 59KB > [ 67.366265] seq_file 210KB 241KB > [ 67.366805] sigqueue 19KB 19KB > [ 67.367386] shmem_inode_cache 795KB 795KB > [ 67.367909] kernfs_node_cache 2565KB 2565KB > [ 67.368489] mnt_cache 31KB 31KB > [ 67.369014] filp 11820KB 11820KB > [ 67.369585] names_cache 327KB 476KB > [ 67.370113] key_jar 15KB 15KB > [ 67.370664] nsproxy 3KB 3KB > [ 67.371230] vm_area_struct 2870KB 3100KB > [ 67.371754] mm_struct 831KB 1154KB > [ 67.372337] fs_cache 176KB 212KB > [ 67.372862] files_cache 843KB 956KB > [ 67.373625] signal_cache 2809KB 2809KB > [ 67.374210] sighand_cache 2615KB 2615KB > [ 67.374750] task_struct 9207KB 9207KB > [ 67.375335] cred_jar 392KB 420KB > [ 67.375856] anon_vma_chain 1058KB 1291KB > [ 67.376437] anon_vma 144KB 160KB > [ 67.376952] pid 609KB 640KB > [ 67.377519] Acpi-Operand 265KB 308KB > [ 67.378063] Acpi-ParseExt 47KB 47KB > [ 67.378645] Acpi-Parse 189KB 205KB > [ 67.379216] Acpi-State 200KB 216KB > [ 67.379747] Acpi-Namespace 24KB 24KB > [ 67.380345] numa_policy 3KB 3KB > [ 67.380870] trace_event_file 151KB 151KB > [ 67.381649] ftrace_event_field 196KB 196KB > [ 67.382199] pool_workqueue 16KB 16KB > [ 67.382722] vmap_area 567KB 567KB > [ 67.383261] page->ptl 384KB 429KB > [ 67.383781] kmemleak_scan_area 286KB 286KB > [ 67.384527] kmemleak_object 162939KB 167943KB > [ 67.385080] kmalloc-8k 21840KB 21840KB > [ 67.385618] kmalloc-4k 25736KB 25736KB > [ 67.386158] kmalloc-2k 15684KB 15684KB > [ 67.386679] kmalloc-1k 44936KB 44936KB > [ 67.387208] kmalloc-512 4192KB 4192KB > [ 67.387826] kmalloc-256 1184KB 1184KB > [ 67.388514] kmalloc-192 5032KB 5032KB > [ 67.389397] kmalloc-128 356KB 356KB > [ 67.390100] kmalloc-96 145KB 156KB > [ 67.390775] kmalloc-64 1052KB 1052KB > [ 67.391489] kmalloc-32 233KB 244KB > [ 67.392261] kmalloc-16 108KB 108KB > [ 67.392964] kmalloc-8 440KB 533KB > [ 67.393657] kmem_cache_node 43KB 43KB > [ 67.394424] kmem_cache 140KB 140KB > [ 67.395296] Tasks state (memory values in pages): > [ 67.395889] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name > [ 67.397031] [ 103] 0 103 7766 1042 81920 0 -1000 systemd-udevd > [ 67.398411] Out of memory and no killable processes... > [ 67.399203] Kernel panic - not syncing: System is deadlocked on memory > [ 67.400146] CPU: 0 PID: 2 Comm: kthreadd Not tainted 5.8.0-rc4-01471-g15d51f3a516b #814 > [ 67.401254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 > [ 67.403154] Call Trace: > [ 67.403536] dump_stack+0x9e/0xe0 > [ 67.404021] panic+0x1ab/0x3ae > [ 67.404497] ? __warn_printk+0xf3/0xf3 > [ 67.405075] ? __rcu_read_unlock+0x58/0x250 > [ 67.405705] ? out_of_memory.cold+0x2d/0xbb > [ 67.406272] ? out_of_memory.cold+0x1f/0xbb > [ 67.406910] out_of_memory.cold+0x45/0xbb > [ 67.407540] ? oom_killer_disable+0x210/0x210 > [ 67.408225] __alloc_pages_slowpath.constprop.0+0x125f/0x1460 > [ 67.409178] ? warn_alloc+0x120/0x120 > [ 67.409849] ? __alloc_pages_nodemask+0x30f/0x5c0 > [ 67.410722] __alloc_pages_nodemask+0x4fd/0x5c0 > [ 67.411533] ? __alloc_pages_slowpath.constprop.0+0x1460/0x1460 > [ 67.412641] alloc_slab_page+0x2e/0x7a0 > [ 67.413345] ? new_slab+0x22e/0x2b0 > [ 67.413883] new_slab+0x276/0x2b0 > [ 67.414534] ___slab_alloc+0x4ba/0x6d0 > [ 67.415221] ? copy_process+0x256d/0x2f80 > [ 67.415930] ? lock_downgrade+0x360/0x360 > [ 67.416659] ? copy_process+0x256d/0x2f80 > [ 67.417390] ? __slab_alloc.isra.0+0x4b/0x90 > [ 67.418171] __slab_alloc.isra.0+0x4b/0x90 > [ 67.418903] ? copy_process+0x256d/0x2f80 > [ 67.419600] kmem_cache_alloc_node+0xb7/0x330 > [ 67.420339] ? trace_hardirqs_on+0x1e/0x130 > [ 67.421078] copy_process+0x256d/0x2f80 > [ 67.421722] ? mark_lock+0x13f/0xc30 > [ 67.422284] ? find_held_lock+0x85/0xa0 > [ 67.422838] ? __cleanup_sighand+0x60/0x60 > [ 67.423515] _do_fork+0xcf/0x840 > [ 67.423978] ? copy_init_mm+0x20/0x20 > [ 67.424496] ? lockdep_hardirqs_on_prepare+0x14c/0x240 > [ 67.425321] ? _raw_spin_unlock_irq+0x24/0x50 > [ 67.426018] ? trace_hardirqs_on+0x1e/0x130 > [ 67.426702] ? preempt_count_sub+0x14/0xc0 > [ 67.427328] ? lock_acquire+0x133/0x4e0 > [ 67.427938] kernel_thread+0xa8/0xe0 > [ 67.428523] ? legacy_clone_args_valid+0x30/0x30 > [ 67.429283] ? kthread_create_on_node+0xd0/0xd0 > [ 67.430026] ? do_raw_spin_unlock+0xa3/0x130 > [ 67.430708] ? preempt_count_sub+0x14/0xc0 > [ 67.431402] kthreadd+0x2be/0x340 > [ 67.431958] ? kthread_create_on_cpu+0x120/0x120 > [ 67.432726] ? lockdep_hardirqs_on_prepare+0x14c/0x240 > [ 67.433575] ? _raw_spin_unlock_irq+0x24/0x50 > [ 67.434288] ? trace_hardirqs_on+0x1e/0x130 > [ 67.434976] ? kthread_create_on_cpu+0x120/0x120 > [ 67.435746] ret_from_fork+0x1f/0x30 > [ 67.436548] Kernel Offset: disabled >
On Fri, 17 Jul 2020 13:01:36 +0200 Lorenzo Bianconi <lorenzo@kernel.org> wrote: > [...] > > > This started showing up with when running ./test_progs from recent > > bpf-next (bfdfa51702de). Any chance it is related? > > > > [ 2950.440613] ============================================= > > > > [ 3073.281578] INFO: task cpumap/0/map:26:536 blocked for more than 860 seconds. > > [ 3073.285492] Tainted: G W 5.8.0-rc4-01471-g15d51f3a516b #814 > > [ 3073.289177] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > > [ 3073.293021] cpumap/0/map:26 D 0 536 2 0x00004000 > > [ 3073.295755] Call Trace: > > [ 3073.297143] __schedule+0x5ad/0xf10 > > [ 3073.299032] ? pci_mmcfg_check_reserved+0xd0/0xd0 > > [ 3073.301416] ? static_obj+0x31/0x80 > > [ 3073.303277] ? mark_held_locks+0x24/0x90 > > [ 3073.305313] ? cpu_map_update_elem+0x6d0/0x6d0 > > [ 3073.307544] schedule+0x6f/0x160 > > [ 3073.309282] schedule_preempt_disabled+0x14/0x20 > > [ 3073.311593] kthread+0x175/0x240 > > [ 3073.313299] ? kthread_create_on_node+0xd0/0xd0 > > [ 3073.315106] ret_from_fork+0x1f/0x30 > > [ 3073.316365] > > Showing all locks held in the system: > > [ 3073.318423] 1 lock held by khungtaskd/33: > > [ 3073.319642] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 > > > > [ 3073.322249] ============================================= > > Hi Jakub, > > can you please provide more info? can you please identify the test that trigger > the issue? I run test_progs with bpf-next master branch and it works fine for me. > I run the tests in a vm with 4 vcpus and 4G of memory. > > Regards, > Lorenzo > Was able to trigger it running the newly added selftest: virtme-init: console is ttyS0 bash-5.0# ./test_progs -n 100 #100/1 cpumap_with_progs:OK #100 xdp_cpumap_attach:OK Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED bash-5.0# [ 247.177168] INFO: task cpumap/0/map:3:198 blocked for more than 122 seconds. [ 247.181306] Not tainted 5.8.0-rc4-01456-gbfdfa51702de #815 [ 247.184487] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 247.188876] cpumap/0/map:3 D 0 198 2 0x00004000 [ 247.192624] Call Trace: [ 247.194327] __schedule+0x5ad/0xf10 [ 247.196860] ? pci_mmcfg_check_reserved+0xd0/0xd0 [ 247.199853] ? static_obj+0x31/0x80 [ 247.201917] ? mark_held_locks+0x24/0x90 [ 247.204398] ? cpu_map_update_elem+0x6d0/0x6d0 [ 247.207098] schedule+0x6f/0x160 [ 247.209079] schedule_preempt_disabled+0x14/0x20 [ 247.211863] kthread+0x175/0x240 [ 247.213698] ? kthread_create_on_node+0xd0/0xd0 [ 247.216054] ret_from_fork+0x1f/0x30 [ 247.218363] [ 247.218363] Showing all locks held in the system: [ 247.222150] 1 lock held by khungtaskd/33: [ 247.224894] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 [ 247.231113] [ 247.232335] ============================================= [ 247.232335] qemu running with 4 vCPUs, 4 GB of memory. .config uploaded at https://paste.centos.org/view/0c14663d HTH, -jkbs
> On Fri, 17 Jul 2020 13:01:36 +0200 > Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > > [...] > > [...] > Was able to trigger it running the newly added selftest: > > virtme-init: console is ttyS0 > bash-5.0# ./test_progs -n 100 > #100/1 cpumap_with_progs:OK > #100 xdp_cpumap_attach:OK > Summary: 1/1 PASSED, 0 SKIPPED, 0 FAILED > bash-5.0# [ 247.177168] INFO: task cpumap/0/map:3:198 blocked for more than 122 seconds. > [ 247.181306] Not tainted 5.8.0-rc4-01456-gbfdfa51702de #815 > [ 247.184487] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 247.188876] cpumap/0/map:3 D 0 198 2 0x00004000 > [ 247.192624] Call Trace: > [ 247.194327] __schedule+0x5ad/0xf10 > [ 247.196860] ? pci_mmcfg_check_reserved+0xd0/0xd0 > [ 247.199853] ? static_obj+0x31/0x80 > [ 247.201917] ? mark_held_locks+0x24/0x90 > [ 247.204398] ? cpu_map_update_elem+0x6d0/0x6d0 > [ 247.207098] schedule+0x6f/0x160 > [ 247.209079] schedule_preempt_disabled+0x14/0x20 > [ 247.211863] kthread+0x175/0x240 > [ 247.213698] ? kthread_create_on_node+0xd0/0xd0 > [ 247.216054] ret_from_fork+0x1f/0x30 > [ 247.218363] > [ 247.218363] Showing all locks held in the system: > [ 247.222150] 1 lock held by khungtaskd/33: > [ 247.224894] #0: ffffffff82d246a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x28/0x1c3 > [ 247.231113] > [ 247.232335] ============================================= > [ 247.232335] > > qemu running with 4 vCPUs, 4 GB of memory. .config uploaded at > https://paste.centos.org/view/0c14663d ack, thx Jakub. I will look at it. Regards, Lorenzo > > HTH, > -jkbs
> On Fri, 17 Jul 2020 13:01:36 +0200 > Lorenzo Bianconi <lorenzo@kernel.org> wrote: > [...] > > HTH, > -jkbs Hi Jakub, can you please test the patch below when you have some free cycles? It fixes the issue in my setup. Regards, Lorenzo diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c index 4c95d0615ca2..f1c46529929b 100644 --- a/kernel/bpf/cpumap.c +++ b/kernel/bpf/cpumap.c @@ -453,24 +453,27 @@ __cpu_map_entry_alloc(struct bpf_cpumap_val *value, u32 cpu, int map_id) rcpu->map_id = map_id; rcpu->value.qsize = value->qsize; + if (fd > 0 && __cpu_map_load_bpf_program(rcpu, fd)) + goto free_ptr_ring; + /* Setup kthread */ rcpu->kthread = kthread_create_on_node(cpu_map_kthread_run, rcpu, numa, "cpumap/%d/map:%d", cpu, map_id); if (IS_ERR(rcpu->kthread)) - goto free_ptr_ring; + goto free_prog; get_cpu_map_entry(rcpu); /* 1-refcnt for being in cmap->cpu_map[] */ get_cpu_map_entry(rcpu); /* 1-refcnt for kthread */ - if (fd > 0 && __cpu_map_load_bpf_program(rcpu, fd)) - goto free_ptr_ring; - /* Make sure kthread runs on a single CPU */ kthread_bind(rcpu->kthread, cpu); wake_up_process(rcpu->kthread); return rcpu; +free_prog: + if (rcpu->prog) + bpf_prog_put(rcpu->prog); free_ptr_ring: ptr_ring_cleanup(rcpu->queue, NULL); free_queue:
On Fri, Jul 17, 2020 at 12:13 PM Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > > On Fri, 17 Jul 2020 13:01:36 +0200 > > Lorenzo Bianconi <lorenzo@kernel.org> wrote: > > > > [...] > > > > > HTH, > > -jkbs > > Hi Jakub, > > can you please test the patch below when you have some free cycles? It fixes > the issue in my setup. > > Regards, > Lorenzo > > diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c > index 4c95d0615ca2..f1c46529929b 100644 > --- a/kernel/bpf/cpumap.c > +++ b/kernel/bpf/cpumap.c > @@ -453,24 +453,27 @@ __cpu_map_entry_alloc(struct bpf_cpumap_val *value, u32 cpu, int map_id) > rcpu->map_id = map_id; > rcpu->value.qsize = value->qsize; > > + if (fd > 0 && __cpu_map_load_bpf_program(rcpu, fd)) > + goto free_ptr_ring; > + > /* Setup kthread */ > rcpu->kthread = kthread_create_on_node(cpu_map_kthread_run, rcpu, numa, > "cpumap/%d/map:%d", cpu, map_id); > if (IS_ERR(rcpu->kthread)) > - goto free_ptr_ring; > + goto free_prog; > > get_cpu_map_entry(rcpu); /* 1-refcnt for being in cmap->cpu_map[] */ > get_cpu_map_entry(rcpu); /* 1-refcnt for kthread */ > > - if (fd > 0 && __cpu_map_load_bpf_program(rcpu, fd)) > - goto free_ptr_ring; > - > /* Make sure kthread runs on a single CPU */ > kthread_bind(rcpu->kthread, cpu); > wake_up_process(rcpu->kthread); > > return rcpu; > > +free_prog: > + if (rcpu->prog) > + bpf_prog_put(rcpu->prog); > free_ptr_ring: > ptr_ring_cleanup(rcpu->queue, NULL); > free_queue: Please send it as a proper patch.
Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the capability to attach and run a XDP program to CPUMAP entries. The idea behind this feature is to add the possibility to define on which CPU run the eBPF program if the underlying hw does not support RSS. I respin patch 1/6 from a previous series sent by David [2]. The functionality has been tested on Marvell Espressobin, i40e and mlx5. Detailed tests results can be found here: https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org Changes since v6: - rebase on top of bpf-next - move bpf_cpumap_val and bpf_prog in the first bpf_cpu_map_entry cache-line Changes since v5: - move bpf_prog_put() in put_cpu_map_entry() - remove READ_ONCE(rcpu->prog) in cpu_map_bpf_prog_run_xdp - rely on bpf_prog_get_type() instead of bpf_prog_get_type_dev() in __cpu_map_load_bpf_program() Changes since v4: - move xdp_clear_return_frame_no_direct inside rcu section - update David Ahern's email address Changes since v3: - fix typo in commit message - fix access to ctx->ingress_ifindex in cpumap bpf selftest Changes since v2: - improved comments - fix return value in xdp_convert_buff_to_frame - added patch 1/9: "cpumap: use non-locked version __ptr_ring_consume_batched" - do not run kmem_cache_alloc_bulk if all frames have been consumed by the XDP program attached to the CPUMAP entry - removed bpf_trace_printk in kselftest Changes since v1: - added performance test results - added kselftest support - fixed memory accounting with page_pool - extended xdp_redirect_cpu_user.c to load an external program to perform redirect - reported ifindex to attached eBPF program - moved bpf_cpumap_val definition to include/uapi/linux/bpf.h [1] https://patchwork.ozlabs.org/project/netdev/cover/20200529220716.75383-1-dsahern@kernel.org/ [2] https://patchwork.ozlabs.org/project/netdev/patch/20200513014607.40418-2-dsahern@kernel.org/ David Ahern (1): net: refactor xdp_convert_buff_to_frame Jesper Dangaard Brouer (1): cpumap: use non-locked version __ptr_ring_consume_batched Lorenzo Bianconi (7): samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option loop cpumap: formalize map value as a named struct bpf: cpumap: add the possibility to attach an eBPF program to cpumap bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map entries libbpf: add SEC name for xdp programs attached to CPUMAP samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap selftest: add tests for XDP programs in CPUMAP entries include/linux/bpf.h | 6 + include/net/xdp.h | 41 ++-- include/trace/events/xdp.h | 16 +- include/uapi/linux/bpf.h | 14 ++ kernel/bpf/cpumap.c | 162 +++++++++++--- net/core/dev.c | 9 + samples/bpf/xdp_redirect_cpu_kern.c | 25 ++- samples/bpf/xdp_redirect_cpu_user.c | 209 ++++++++++++++++-- tools/include/uapi/linux/bpf.h | 14 ++ tools/lib/bpf/libbpf.c | 2 + .../bpf/prog_tests/xdp_cpumap_attach.c | 70 ++++++ .../bpf/progs/test_xdp_with_cpumap_helpers.c | 36 +++ 12 files changed, 531 insertions(+), 73 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c