The patch titled
Subject: mm: hugetlb: fix non-atomic enqueue of huge page
has been added to the -mm tree. Its filename is
mm-hugetlb-fix-non-atomic-enqueue-of-huge-page.patch
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From: Hillf Danton <dhillf@xxxxxxxxx>
Subject: mm: hugetlb: fix non-atomic enqueue of huge page
If a huge page is enqueued under the protection of hugetlb_lock, then the
operation is atomic and safe.
Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
Reviewed-by: Michal Hocko <mhocko@xxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [2.6.37+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/hugetlb.c~mm-hugetlb-fix-non-atomic-enqueue-of-huge-page mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-fix-non-atomic-enqueue-of-huge-page
+++ a/mm/hugetlb.c
@@ -901,7 +901,6 @@ retry:
h->resv_huge_pages += delta;
ret = 0;
- spin_unlock(&hugetlb_lock);
/* Free the needed pages to the hugetlb pool */
list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
if ((--needed) < 0)
@@ -915,6 +914,7 @@ retry:
VM_BUG_ON(page_count(page));
enqueue_huge_page(h, page);
}
+ spin_unlock(&hugetlb_lock);
/* Free unnecessary surplus pages to the buddy allocator */
free:
_
Subject: Subject: mm: hugetlb: fix non-atomic enqueue of huge page
Patches currently in -mm which might be from dhillf@xxxxxxxxx are
origin.patch
mm-hugetlb-fix-non-atomic-enqueue-of-huge-page.patch
linux-next.patch
hugetlb-detect-race-upon-page-allocation-failure-during-cow.patch
hugetlb-clarify-hugetlb_instantiation_mutex-usage.patch
mm-compaction-push-isolate-search-base-of-compact-control-one-pfn-ahead.patch
mm-hugetlb-fix-pgoff-computation-when-unmapping-page-from-vma.patch
mm-hugetlb-fix-pgoff-computation-when-unmapping-page-from-vma-fix.patch
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