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* Siddha, Suresh B <suresh.b.siddha@intel.com> wrote: > Align the per cpu runqueue to the cacheline boundary. This will > minimize the number of cachelines touched during remote wakeup. > -static DEFINE_PER_CPU(struct rq, runqueues); > +static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp; ouch!! Now how did _that_ slip through. The runqueues had been cacheline-aligned for ages. Or at least, they were supposed to be. could you see any improvement in profiles or workloads with this patch applied? (just curious - it's an obviously right fix) > Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Ingo Molnar <mingo@elte.hu> Ingo - 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/ | |||||||||
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