Commit-ID: 3cf1962cdbf6b3a9e3ef21116d215bbab350ea37 Gitweb: http://git.kernel.org/tip/3cf1962cdbf6b3a9e3ef21116d215bbab350ea37 Author: Rik van Riel <riel@xxxxxxxxxx> AuthorDate: Tue, 18 Feb 2014 17:12:44 -0500 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Fri, 21 Feb 2014 21:27:10 +0100 sched,numa: add cond_resched to task_numa_work Normally task_numa_work scans over a fairly small amount of memory, but it is possible to run into a large unpopulated part of virtual memory, with no pages mapped. In that case, task_numa_work can run for a while, and it may make sense to reschedule as required. Cc: akpm@xxxxxxxxxxxxxxxxxxxx Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx> Signed-off-by: Rik van Riel <riel@xxxxxxxxxx> Reported-by: Xing Gang <gang.xing@xxxxxx> Tested-by: Chegu Vinod <chegu_vinod@xxxxxx> Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1392761566-24834-2-git-send-email-riel@xxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- kernel/sched/fair.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 966cc2b..7815709 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1757,6 +1757,8 @@ void task_numa_work(struct callback_head *work) start = end; if (pages <= 0) goto out; + + cond_resched(); } while (end != vma->vm_end); } -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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