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| author | Hillf Danton <dhillf@gmail.com> | 2011-12-28 15:57:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-12-29 16:31:57 -0800 |
| commit | b0365c8d0cb6e79eb5f21418ae61ab511f31b575 (patch) | |
| tree | 2e8abddb0f0f7829e48d00464f95b835bdb6ff51 | |
| parent | 34845636a184f3be91a531098192592cbe6db587 (diff) | |
| download | linux-b0365c8d0cb6e79eb5f21418ae61ab511f31b575.tar.gz linux-b0365c8d0cb6e79eb5f21418ae61ab511f31b575.tar.bz2 linux-b0365c8d0cb6e79eb5f21418ae61ab511f31b575.zip | |
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@gmail.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@vger.kernel.org> [2.6.37+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/hugetlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 73f17c0293c0..2316840b337a 100644 --- a/mm/hugetlb.c +++ b/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: |