diff options
| author | Hillf Danton <dhillf@gmail.com> | 2011-12-28 15:57:16 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2012-01-06 14:17:22 -0800 |
| commit | 82b34c64333393dc83d2c892114c9fb5cf432ea4 (patch) | |
| tree | c283e587862caaf00568e3eb749d709ad90eac51 /mm | |
| parent | f40c06e7f41a1489e9c75619d2e4d40a23d915b4 (diff) | |
mm: hugetlb: fix non-atomic enqueue of huge page
commit b0365c8d0cb6e79eb5f21418ae61ab511f31b575 upstream.
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>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'mm')
| -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: |