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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2010-09-08 10:19:33 +0900
committerAndi Kleen <ak@linux.intel.com>2010-10-08 09:32:44 +0200
commitbf50bab2b34483316162443587b8467952e07730 (patch)
treed142f7427c6b82e11ff9333bf507aa24b9525e3e /include/linux/hugetlb.h
parent998b4382c1d75a6fd3b0e334dae3ab33bd074d99 (diff)
downloadop-kernel-dev-bf50bab2b34483316162443587b8467952e07730.zip
op-kernel-dev-bf50bab2b34483316162443587b8467952e07730.tar.gz
hugetlb: add allocate function for hugepage migration
We can't use existing hugepage allocation functions to allocate hugepage for page migration, because page migration can happen asynchronously with the running processes and page migration users should call the allocation function with physical addresses (not virtual addresses) as arguments. ChangeLog since v3: - unify alloc_buddy_huge_page() and alloc_buddy_huge_page_node() ChangeLog since v2: - remove unnecessary get/put_mems_allowed() (thanks to David Rientjes) ChangeLog since v1: - add comment on top of alloc_huge_page_no_vma() Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Reviewed-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
Diffstat (limited to 'include/linux/hugetlb.h')
-rw-r--r--include/linux/hugetlb.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index f479700..0b73c53 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -228,6 +228,8 @@ struct huge_bootmem_page {
struct hstate *hstate;
};
+struct page *alloc_huge_page_node(struct hstate *h, int nid);
+
/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);
@@ -303,6 +305,7 @@ static inline struct hstate *page_hstate(struct page *page)
#else
struct hstate {};
+#define alloc_huge_page_node(h, nid) NULL
#define alloc_bootmem_huge_page(h) NULL
#define hstate_file(f) NULL
#define hstate_vma(v) NULL
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