Messages in this thread Patch in this message | | | Date | Wed, 2 Dec 2009 14:15:05 +0000 | From | Mel Gorman <> | Subject | [PATCH] hugetlb: Abort a hugepage pool resize if a signal is pending |
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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.
[dave@linux.vnet.ibm.com: His idea] Signed-off-by: Mel Gorman <mel@csn.ul.ie> --- mm/hugetlb.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index af02ee8..a952cb8 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1238,6 +1238,9 @@ 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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