From 536240f2bde98216feac87b4891d19a536b8884a Mon Sep 17 00:00:00 2001 From: Mel Gorman Date: Mon, 14 Dec 2009 17:59:56 -0800 Subject: hugetlb: abort a hugepage pool resize if a signal is pending If a user asks for a hugepage pool resize but specified a large number, the machine can begin trashing. In response, they might hit ctrl-c but signals are ignored and the pool resize continues until it fails an allocation. This can take a considerable amount of time so this patch aborts a pool resize if a signal is pending. Suggested by Dave Hansen. Signed-off-by: Mel Gorman Cc: Dave Hansen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 6df8065039e..65f38c21820 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1278,6 +1278,9 @@ static unsigned long set_max_huge_pages(struct hstate *h, unsigned long count, if (!ret) goto out; + /* Bail for signals. Probably ctrl-c from user */ + if (signal_pending(current)) + goto out; } /* -- cgit v1.2.3-70-g09d2