Re: [PATCH 0/4] Fix ebizzy performance regression due to X86 TLBrange flush v2

From: Peter Zijlstra
Date: Tue Dec 17 2013 - 04:26:35 EST


On Tue, Dec 17, 2013 at 09:21:25AM +0000, Mel Gorman wrote:
> if (sd) {
> id = cpumask_first(sched_domain_span(sd));
> size = cpumask_weight(sched_domain_span(sd));
> - sd = sd->parent; /* sd_busy */
> + busy_sd = sd->parent; /* sd_busy */
> }
> - rcu_assign_pointer(per_cpu(sd_busy, cpu), sd);
> + rcu_assign_pointer(per_cpu(sd_busy, cpu), busy_sd);

Argh, so much for paying attention :/

Thanks!
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