Subject: + mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages.patch added to -mm tree
To: m.mizuma@xxxxxxxxxxxxxx,aneesh.kumar@xxxxxxxxxxxxxxxxxx,iamjoonsoo.kim@xxxxxxx,kosaki.motohiro@xxxxxxxxxxxxxx,mhocko@xxxxxxx,n-horiguchi@xxxxxxxxxxxxx,stable@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 09 Apr 2014 12:21:02 -0700
The patch titled
Subject: mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
has been added to the -mm tree. Its filename is
mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages.patch
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------------------------------------------------------
From: "Mizuma, Masayoshi" <m.mizuma@xxxxxxxxxxxxxx>
Subject: mm/hugetlb.c: add cond_resched_lock() in return_unused_surplus_pages()
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@xxxxxxxxxxxxxx>
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Aneesh Kumar <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/hugetlb.c~mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages
+++ a/mm/hugetlb.c
@@ -1173,6 +1173,7 @@ static void return_unused_surplus_pages(
while (nr_pages--) {
if (!free_pool_huge_page(h, &node_states[N_MEMORY], 1))
break;
+ cond_resched_lock(&hugetlb_lock);
}
}
_
Patches currently in -mm which might be from m.mizuma@xxxxxxxxxxxxxx are
origin.patch
mm-hugetlbc-add-cond_resched_lock-in-return_unused_surplus_pages.patch
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