Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751604Ab1CZMw5 (ORCPT ); Sat, 26 Mar 2011 08:52:57 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:63327 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751085Ab1CZMw4 (ORCPT ); Sat, 26 Mar 2011 08:52:56 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=Vm9h+lmdwUt1HymeykwKWorS5CONj0x91qLVGDHQEIndJbiKVimpBBNP99brH3BUqY /c2z4DmLXFbmDj1KkD6uKNQ00zFM2R6DZK47RqDMJgdfYaGo99t5CgMdt8lAC3J1Ugun 9hsQBDe2KQDfIrgAu2IRd3khMcBwbSCjtA//g= MIME-Version: 1.0 Date: Sat, 26 Mar 2011 18:22:55 +0530 Message-ID: Subject: [PATCH] sched: Replace NR_CPUS with num_online_cpus() From: Sisir Koppaka To: Ingo Molnar , Peter Zijlstra , linux-kernel@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1274 Lines: 42 The interval for checking scheduling domains if they are due to be balanced currently depends on boot state NR_CPUS, which may not accurately reflect the number of online CPUs at the time of check. Signed-off-by: Sisir Koppaka --- kernel/sched_fair.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 3f7ec9e..c7ec5c8 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -22,6 +22,7 @@ #include #include +#include /* * Targeted preemption latency for CPU-bound tasks: @@ -3850,8 +3851,8 @@ static void rebalance_domains(int cpu, enum cpu_idle_type idle) interval = msecs_to_jiffies(interval); if (unlikely(!interval)) interval = 1; - if (interval > HZ*NR_CPUS/10) - interval = HZ*NR_CPUS/10; + if (interval > HZ*num_online_cpus()/10) + interval = HZ*num_online_cpus()/10; need_serialize = sd->flags & SD_SERIALIZE; -- 1.7.0.4 Sisir -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/