Messages in this thread | | | Date | Tue, 24 Apr 2018 14:47:12 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 2/3] sched: introduce per-cpu var next_cpu to track search limit |
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On Mon, Apr 23, 2018 at 05:41:15PM -0700, subhra mazumdar wrote: > @@ -17,6 +17,7 @@ > #include <trace/events/sched.h> > > DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); > +DEFINE_PER_CPU_SHARED_ALIGNED(int, next_cpu); > > #if defined(CONFIG_SCHED_DEBUG) && defined(HAVE_JUMP_LABEL) > /* > @@ -6018,6 +6019,7 @@ void __init sched_init(void) > struct rq *rq; > > rq = cpu_rq(i); > + per_cpu(next_cpu, i) = -1;
If you leave it uninitialized it'll be 0, and we can avoid that extra branch in the next patch, no?
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