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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2013-09-11 14:21:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-11 15:57:44 -0700 |
| commit | 8312034f3604bc0339c40545c538116f4ddad152 (patch) | |
| tree | e0f0033270c7f80a88218ea67e6d69120a78f2bb /mm/hugetlb.c | |
| parent | 5944d0116c773319a48ea6812d1891aa6d0bbbbf (diff) | |
| download | op-kernel-dev-8312034f3604bc0339c40545c538116f4ddad152.zip op-kernel-dev-8312034f3604bc0339c40545c538116f4ddad152.tar.gz | |
mm, hugetlb: grab a page_table_lock after page_cache_release
We don't need to grab a page_table_lock when we try to release a page.
So, defer to grab a page_table_lock.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index f6347ec..5bf6468 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -2647,10 +2647,11 @@ retry_avoidcopy: } spin_unlock(&mm->page_table_lock); mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end); - /* Caller expects lock to be held */ - spin_lock(&mm->page_table_lock); page_cache_release(new_page); page_cache_release(old_page); + + /* Caller expects lock to be held */ + spin_lock(&mm->page_table_lock); return 0; } |
