[PATCH 3/8] Preserve local node for KSM copies
From: Andi Kleen <hidden>
Date: 2011-02-21 19:08:29
Also in:
lkml
Subsystem:
memory management, memory management - core, memory management - ksm (kernel samepage merging), memory management - page allocator, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Vlastimil Babka, Linus Torvalds
From: Andi Kleen <redacted> Add a alloc_page_vma_node that allows passing the "local" node in. Use it in ksm to allocate copy pages on the same node as the original as possible. Cc: arcange@redhat.com Signed-off-by: Andi Kleen <redacted> --- include/linux/gfp.h | 2 ++ mm/ksm.c | 3 ++- 2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/include/linux/gfp.h b/include/linux/gfp.h
index 782e74a..814d50e 100644
--- a/include/linux/gfp.h
+++ b/include/linux/gfp.h@@ -343,6 +343,8 @@ extern struct page *alloc_pages_vma(gfp_t gfp_mask, int order, #define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0) #define alloc_page_vma(gfp_mask, vma, addr) \ alloc_pages_vma(gfp_mask, 0, vma, addr, numa_node_id()) +#define alloc_page_vma_node(gfp_mask, vma, addr, node) \ + alloc_pages_vma(gfp_mask, 0, vma, addr, node) extern unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order); extern unsigned long get_zeroed_page(gfp_t gfp_mask);
diff --git a/mm/ksm.c b/mm/ksm.c
index c2b2a94..fc83335 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c@@ -1575,7 +1575,8 @@ struct page *ksm_does_need_to_copy(struct page *page, { struct page *new_page; - new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address); + new_page = alloc_page_vma_node(GFP_HIGHUSER_MOVABLE, vma, address, + page_to_nid(page)); if (new_page) { copy_user_highpage(new_page, page, address, vma);
--
1.7.4
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