Commit 536240f2 authored Dec 14, 2009 by Mel Gorman Committed by Linus Torvalds Dec 15, 2009

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 <mel@csn.ul.ie>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6927c1dd

mm/hugetlb.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

		/*

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