From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx177.postini.com [74.125.245.177]) by kanga.kvack.org (Postfix) with SMTP id 9E2046B0044 for ; Mon, 26 Mar 2012 15:08:40 -0400 (EDT) From: Andrea Arcangeli Subject: [PATCH 20/39] autonuma: avoid CFS select_task_rq_fair to return -1 Date: Mon, 26 Mar 2012 19:46:07 +0200 Message-Id: <1332783986-24195-21-git-send-email-aarcange@redhat.com> In-Reply-To: <1332783986-24195-1-git-send-email-aarcange@redhat.com> References: <1332783986-24195-1-git-send-email-aarcange@redhat.com> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Hillf Danton , Dan Smith , Peter Zijlstra , Linus Torvalds , Andrew Morton , Thomas Gleixner , Ingo Molnar , Paul Turner , Suresh Siddha , Mike Galbraith , "Paul E. McKenney" , Lai Jiangshan , Bharata B Rao , Lee Schermerhorn , Rik van Riel , Johannes Weiner Fix to avoid -1 retval. Signed-off-by: Andrea Arcangeli --- kernel/sched/fair.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 94340c7..25e9e5b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2769,6 +2769,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags) goto unlock; } + prev_cpu = new_cpu; while (sd) { int load_idx = sd->forkexec_idx; struct sched_group *group; @@ -2792,6 +2793,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags) if (new_cpu == -1 || new_cpu == cpu) { /* Now try balancing at a lower domain level of cpu */ sd = sd->child; + new_cpu = prev_cpu; continue; } @@ -2810,6 +2812,7 @@ select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags) unlock: rcu_read_unlock(); + BUG_ON(new_cpu < 0); return new_cpu; } #endif /* CONFIG_SMP */ -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org