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authorMizuma, Masayoshi <m.mizuma@jp.fujitsu.com>2014-04-18 15:07:18 -0700
committerBen Hutchings <ben@decadent.org.uk>2014-05-18 14:58:06 +0100
commitb8309464fb222570eadd3e9d4668dd1f01ad8189 (patch)
treeed29125bb6d90f2785dc2f04b9f9cfa7fdb70955 /mm
parentf9a65249cf4ed11170dadd3d5b61c6864bdf7df7 (diff)
mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
commit 7848a4bf51b34f41fcc9bd77e837126d99ae84e3 upstream. soft lockup in freeing gigantic hugepage fixed in commit 55f67141a892 "mm: hugetlb: fix softlockup when a large number of hugepages are freed." can happen in return_unused_surplus_pages(), so let's fix it. Signed-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com> Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index d399f5ff5d9c..cac2441956dc 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1078,6 +1078,7 @@ static void return_unused_surplus_pages(struct hstate *h,
while (nr_pages--) {
if (!free_pool_huge_page(h, &node_states[N_HIGH_MEMORY], 1))
break;
+ cond_resched_lock(&hugetlb_lock);
}
}