Commit-ID: 554cecaf733623b327eef9652b65965eb1081b81 Gitweb: http://git.kernel.org/tip/554cecaf733623b327eef9652b65965eb1081b81 Author: Diwakar Tundlam <dtundlam@xxxxxxxxxx> AuthorDate: Wed, 7 Mar 2012 14:44:26 -0800 Committer: Ingo Molnar <mingo@xxxxxxx> CommitDate: Mon, 12 Mar 2012 20:43:16 +0100 sched/nohz: Correctly initialize 'next_balance' in 'nohz' idle balancer The 'next_balance' field of 'nohz' idle balancer must be initialized to jiffies. Since jiffies is initialized to negative 300 seconds the 'nohz' idle balancer does not run for the first 300s (5mins) after bootup. If no new processes are spawed or no idle cycles happen, the load on the cpus will remain unbalanced for that duration. Signed-off-by: Diwakar Tundlam <dtundlam@xxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Link: http://lkml.kernel.org/r/1DD7BFEDD3147247B1355BEFEFE4665237994F30EF@xxxxxxxxxxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxx> --- kernel/sched/fair.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index def17aa..11f3979 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -5571,6 +5571,7 @@ __init void init_sched_fair_class(void) open_softirq(SCHED_SOFTIRQ, run_rebalance_domains); #ifdef CONFIG_NO_HZ + nohz.next_balance = jiffies; zalloc_cpumask_var(&nohz.idle_cpus_mask, GFP_NOWAIT); cpu_notifier(sched_ilb_notifier, 0); #endif -- 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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