Messages in this thread | | | Date | Fri, 2 Oct 2020 16:20:28 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 3/9] sched/hotplug: Ensure only per-cpu kthreads run during hotplug |
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On Fri, Sep 25, 2020 at 06:38:50PM +0200, Dietmar Eggemann wrote: > On 21/09/2020 18:36, Peter Zijlstra wrote: > > [...] > > > This replaces the unlikely(rq->balance_callbacks) test at the tail of > > context_switch with an unlikely(rq->balance_work), the fast path is > > While looking for why BALANCE_WORK is needed: > > Shouldn't this be unlikely(rq->balance_callback) and > unlikely(rq->balance_flags)?
But then we have two loads in the fastpath..
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