| Message ID | 20240801060826.559858-3-rppt@kernel.org (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | mm: introduce numa_memblks | expand |
On Thu, 1 Aug 2024 09:08:02 +0300 Mike Rapoport <rppt@kernel.org> wrote: > From: "Mike Rapoport (Microsoft)" <rppt@kernel.org> > > sgi-ip27 is the only system that defines NODE_DATA() differently than > the rest of NUMA machines. > > Add node_data array of struct pglist pointers that will point to > __node_data[node]->pglist and redefine NODE_DATA() to use node_data > array. > > This will allow pulling declaration of node_data to the generic mm code > in the next commit. > > Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> After staring for a while at the use made of the other part of the __node_data I think what you have in this an the next two patches is fine. I'm far from convinced it was correct before though as arch_refresh_node_data() called on offline nodes in free_area_init() would have replaced __node_data with an allocation of size pg_data_t but the hub_data(), visible below, is after that. Maybe hub_data() as never called for offline nodes, but I couldn't establish that. After these patches the arch_refresh_node_data() generic version will only be replacing the pointer in node_data leaving the hub_data where it was in the first place and thus is fine. So with that in mind (and it could be completely wrong ;) Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> > --- > arch/mips/include/asm/mach-ip27/mmzone.h | 5 ++++- > arch/mips/sgi-ip27/ip27-memory.c | 5 ++++- > 2 files changed, 8 insertions(+), 2 deletions(-) > > diff --git a/arch/mips/include/asm/mach-ip27/mmzone.h b/arch/mips/include/asm/mach-ip27/mmzone.h > index 08c36e50a860..629c3f290203 100644 > --- a/arch/mips/include/asm/mach-ip27/mmzone.h > +++ b/arch/mips/include/asm/mach-ip27/mmzone.h > @@ -22,7 +22,10 @@ struct node_data { > > extern struct node_data *__node_data[]; > > -#define NODE_DATA(n) (&__node_data[(n)]->pglist) > #define hub_data(n) (&__node_data[(n)]->hub) > > +extern struct pglist_data *node_data[]; > + > +#define NODE_DATA(nid) (node_data[nid]) > + > #endif /* _ASM_MACH_MMZONE_H */ > diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c > index b8ca94cfb4fe..c30ef6958b97 100644 > --- a/arch/mips/sgi-ip27/ip27-memory.c > +++ b/arch/mips/sgi-ip27/ip27-memory.c > @@ -34,8 +34,10 @@ > #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT) > #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT) > > -struct node_data *__node_data[MAX_NUMNODES]; > +struct pglist_data *node_data[MAX_NUMNODES]; > +EXPORT_SYMBOL(node_data); > > +struct node_data *__node_data[MAX_NUMNODES]; > EXPORT_SYMBOL(__node_data); > > static u64 gen_region_mask(void) > @@ -361,6 +363,7 @@ static void __init node_mem_init(nasid_t node) > */ > __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); > memset(__node_data[node], 0, PAGE_SIZE); > + node_data[node] = &__node_data[node]->pglist; > > NODE_DATA(node)->node_start_pfn = start_pfn; > NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;
On 01.08.24 08:08, Mike Rapoport wrote: > From: "Mike Rapoport (Microsoft)" <rppt@kernel.org> > > sgi-ip27 is the only system that defines NODE_DATA() differently than > the rest of NUMA machines. > > Add node_data array of struct pglist pointers that will point to > __node_data[node]->pglist and redefine NODE_DATA() to use node_data > array. > > This will allow pulling declaration of node_data to the generic mm code > in the next commit. > > Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> > --- Acked-by: David Hildenbrand <david@redhat.com>
diff --git a/arch/mips/include/asm/mach-ip27/mmzone.h b/arch/mips/include/asm/mach-ip27/mmzone.h index 08c36e50a860..629c3f290203 100644 --- a/arch/mips/include/asm/mach-ip27/mmzone.h +++ b/arch/mips/include/asm/mach-ip27/mmzone.h @@ -22,7 +22,10 @@ struct node_data { extern struct node_data *__node_data[]; -#define NODE_DATA(n) (&__node_data[(n)]->pglist) #define hub_data(n) (&__node_data[(n)]->hub) +extern struct pglist_data *node_data[]; + +#define NODE_DATA(nid) (node_data[nid]) + #endif /* _ASM_MACH_MMZONE_H */ diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c index b8ca94cfb4fe..c30ef6958b97 100644 --- a/arch/mips/sgi-ip27/ip27-memory.c +++ b/arch/mips/sgi-ip27/ip27-memory.c @@ -34,8 +34,10 @@ #define SLOT_PFNSHIFT (SLOT_SHIFT - PAGE_SHIFT) #define PFN_NASIDSHFT (NASID_SHFT - PAGE_SHIFT) -struct node_data *__node_data[MAX_NUMNODES]; +struct pglist_data *node_data[MAX_NUMNODES]; +EXPORT_SYMBOL(node_data); +struct node_data *__node_data[MAX_NUMNODES]; EXPORT_SYMBOL(__node_data); static u64 gen_region_mask(void) @@ -361,6 +363,7 @@ static void __init node_mem_init(nasid_t node) */ __node_data[node] = __va(slot_freepfn << PAGE_SHIFT); memset(__node_data[node], 0, PAGE_SIZE); + node_data[node] = &__node_data[node]->pglist; NODE_DATA(node)->node_start_pfn = start_pfn; NODE_DATA(node)->node_spanned_pages = end_pfn - start_pfn;