| Message ID | 20230606045608.55127-1-aneesh.kumar@linux.ibm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Add support for DAX vmemmap optimization for ppc64 | expand |
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> writes: > This patch series implements changes required to support DAX vmemmap > optimization for ppc64. The vmemmap optimization is only enabled with radix MMU > translation and 1GB PUD mapping with 64K page size. The patch series also split > hugetlb vmemmap optimization as a separate Kconfig variable so that > architectures can enable DAX vmemmap optimization without enabling hugetlb > vmemmap optimization. This should enable architectures like arm64 to enable DAX > vmemmap optimization while they can't enable hugetlb vmemmap optimization. More > details of the same are in patch "mm/vmemmap optimization: Split hugetlb and > d > > Aneesh Kumar K.V (16): > powerpc/mm/book3s64: Use pmdp_ptep helper instead of typecasting. > powerpc/book3s64/mm: mmu_vmemmap_psize is used by radix > powerpc/book3s64/mm: Fix DirectMap stats in /proc/meminfo > powerpc/book3s64/mm: Use PAGE_KERNEL instead of opencoding > powerpc/mm/dax: Fix the condition when checking if altmap vmemap can > cross-boundary > mm/hugepage pud: Allow arch-specific helper function to check huge > page pud support > mm: Change pudp_huge_get_and_clear_full take vm_area_struct as arg > mm/vmemmap: Improve vmemmap_can_optimize and allow architectures to > override > mm/vmemmap: Allow architectures to override how vmemmap optimization > works > mm: Add __HAVE_ARCH_PUD_SAME similar to __HAVE_ARCH_P4D_SAME > mm/huge pud: Use transparent huge pud helpers only with > CONFIG_TRANSPARENT_HUGEPAGE > mm/vmemmap optimization: Split hugetlb and devdax vmemmap optimization > powerpc/book3s64/mm: Enable transparent pud hugepage > powerpc/book3s64/vmemmap: Switch radix to use a different vmemmap > handling function > powerpc/book3s64/radix: Add support for vmemmap optimization for radix > powerpc/book3s64/radix: Remove mmu_vmemmap_psize Gentle ping. Any objections for this series? -aneesh
This patch series implements changes required to support DAX vmemmap optimization for ppc64. The vmemmap optimization is only enabled with radix MMU translation and 1GB PUD mapping with 64K page size. The patch series also split hugetlb vmemmap optimization as a separate Kconfig variable so that architectures can enable DAX vmemmap optimization without enabling hugetlb vmemmap optimization. This should enable architectures like arm64 to enable DAX vmemmap optimization while they can't enable hugetlb vmemmap optimization. More details of the same are in patch "mm/vmemmap optimization: Split hugetlb and d Aneesh Kumar K.V (16): powerpc/mm/book3s64: Use pmdp_ptep helper instead of typecasting. powerpc/book3s64/mm: mmu_vmemmap_psize is used by radix powerpc/book3s64/mm: Fix DirectMap stats in /proc/meminfo powerpc/book3s64/mm: Use PAGE_KERNEL instead of opencoding powerpc/mm/dax: Fix the condition when checking if altmap vmemap can cross-boundary mm/hugepage pud: Allow arch-specific helper function to check huge page pud support mm: Change pudp_huge_get_and_clear_full take vm_area_struct as arg mm/vmemmap: Improve vmemmap_can_optimize and allow architectures to override mm/vmemmap: Allow architectures to override how vmemmap optimization works mm: Add __HAVE_ARCH_PUD_SAME similar to __HAVE_ARCH_P4D_SAME mm/huge pud: Use transparent huge pud helpers only with CONFIG_TRANSPARENT_HUGEPAGE mm/vmemmap optimization: Split hugetlb and devdax vmemmap optimization powerpc/book3s64/mm: Enable transparent pud hugepage powerpc/book3s64/vmemmap: Switch radix to use a different vmemmap handling function powerpc/book3s64/radix: Add support for vmemmap optimization for radix powerpc/book3s64/radix: Remove mmu_vmemmap_psize Documentation/mm/vmemmap_dedup.rst | 1 + Documentation/powerpc/vmemmap_dedup.rst | 101 ++++ arch/loongarch/Kconfig | 2 +- arch/powerpc/Kconfig | 1 + arch/powerpc/include/asm/book3s/64/pgtable.h | 156 ++++- arch/powerpc/include/asm/book3s/64/radix.h | 47 ++ .../include/asm/book3s/64/tlbflush-radix.h | 2 + arch/powerpc/include/asm/book3s/64/tlbflush.h | 8 + arch/powerpc/include/asm/pgtable.h | 3 + arch/powerpc/mm/book3s64/pgtable.c | 78 +++ arch/powerpc/mm/book3s64/radix_pgtable.c | 551 ++++++++++++++++-- arch/powerpc/mm/book3s64/radix_tlb.c | 7 + arch/powerpc/mm/init_64.c | 39 +- arch/powerpc/platforms/Kconfig.cputype | 1 + arch/riscv/Kconfig | 2 +- arch/x86/Kconfig | 3 +- drivers/nvdimm/pfn_devs.c | 2 +- fs/Kconfig | 2 +- include/linux/mm.h | 32 +- include/linux/pgtable.h | 11 +- include/trace/events/thp.h | 17 + mm/Kconfig | 5 +- mm/debug_vm_pgtable.c | 2 +- mm/huge_memory.c | 2 +- mm/mm_init.c | 2 +- mm/mremap.c | 2 +- mm/sparse-vmemmap.c | 3 + 27 files changed, 1005 insertions(+), 77 deletions(-) create mode 100644 Documentation/powerpc/vmemmap_dedup.rst