On Thu, Feb 21, 2019 at 12:49:41AM -0500, Joel Fernandes (Google) wrote: > Also replace rcu_assign_pointer call on rq->sd with WRITE_ONCE. This > should be sufficient for the rq->sd initialization. > @@ -668,7 +668,7 @@ cpu_attach_domain(struct sched_domain *sd, struct root_domain *rd, int cpu) > > rq_attach_root(rq, rd); > tmp = rq->sd; > - rcu_assign_pointer(rq->sd, sd); > + WRITE_ONCE(rq->sd, sd); > dirty_sched_domain_sysctl(cpu); > destroy_sched_domains(tmp); Where did the RELEASE barrier go? That was a publish operation, now it is not.
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