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authorAndrea Arcangeli <aarcange@redhat.com>2011-11-02 13:37:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-02 16:06:57 -0700
commit8596468487e2062cae2aad56e973784e03959245 (patch)
tree259696a6595fbd3ea56a987a5947217475542744 /arch/powerpc/mm
parent405e44f2e312dd5dd63e5a9f459bffcbcd4368ef (diff)
downloadop-kernel-dev-8596468487e2062cae2aad56e973784e03959245.zip
op-kernel-dev-8596468487e2062cae2aad56e973784e03959245.tar.gz
powerpc: gup_hugepte() avoid freeing the head page too many times
We only taken "refs" pins on the head page not "*nr" pins. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <jweiner@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/mm')
-rw-r--r--arch/powerpc/mm/hugetlbpage.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c
index b649c28..78b14ab 100644
--- a/arch/powerpc/mm/hugetlbpage.c
+++ b/arch/powerpc/mm/hugetlbpage.c
@@ -428,10 +428,9 @@ static noinline int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long add
if (unlikely(pte_val(pte) != pte_val(*ptep))) {
/* Could be optimized better */
- while (*nr) {
+ *nr -= refs;
+ while (refs--)
put_page(head);
- (*nr)--;
- }
}
return 1;
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