From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755375AbaBUUdG (ORCPT ); Fri, 21 Feb 2014 15:33:06 -0500 Received: from terminus.zytor.com ([198.137.202.10]:58567 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755201AbaBUUdC (ORCPT ); Fri, 21 Feb 2014 15:33:02 -0500 Date: Fri, 21 Feb 2014 12:32:14 -0800 From: tip-bot for Rik van Riel Message-ID: Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, peterz@infradead.org, gang.xing@hp.com, riel@redhat.com, aarcange@redhat.com, chegu_vinod@hp.com, tglx@linutronix.de Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, peterz@infradead.org, gang.xing@hp.com, riel@redhat.com, aarcange@redhat.com, chegu_vinod@hp.com, tglx@linutronix.de In-Reply-To: <1392761566-24834-2-git-send-email-riel@redhat.com> References: <1392761566-24834-2-git-send-email-riel@redhat.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/urgent] sched,numa: add cond_resched to task_numa_work Git-Commit-ID: 3cf1962cdbf6b3a9e3ef21116d215bbab350ea37 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 3cf1962cdbf6b3a9e3ef21116d215bbab350ea37 Gitweb: http://git.kernel.org/tip/3cf1962cdbf6b3a9e3ef21116d215bbab350ea37 Author: Rik van Riel AuthorDate: Tue, 18 Feb 2014 17:12:44 -0500 Committer: Thomas Gleixner 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@linux-foundation.org Cc: Andrea Arcangeli Signed-off-by: Rik van Riel Reported-by: Xing Gang Tested-by: Chegu Vinod Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1392761566-24834-2-git-send-email-riel@redhat.com Signed-off-by: Thomas Gleixner --- 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); }