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Message-ID: <AANLkTikqHWid2Q93F5U5Qw5snJH8C5PXoa7J6=6hYO94@mail.gmail.com> Date: Sat, 26 Mar 2011 18:22:55 +0530 From: Sisir Koppaka <sisir.koppaka@...il.com> To: Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>, linux-kernel@...r.kernel.org Subject: [PATCH] sched: Replace NR_CPUS with num_online_cpus() 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 <sisir.koppaka@...il.com> --- 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 <linux/latencytop.h> #include <linux/sched.h> +#include <linux/cpumask.h> /* * 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@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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