On Tue, Oct 1, 2019 at 12:19 AM Peter Zijlstra <pet...@infradead.org> wrote: > > On Mon, Sep 30, 2019 at 04:45:49PM -0700, John Stultz wrote: > > Reverting the following patches: > > > "sched/membarrier: Fix p->mm->membarrier_state racy load" > > ARGH, I fudged it... please try: > > > diff --git a/kernel/sched/membarrier.c b/kernel/sched/membarrier.c > index a39bed2c784f..168479a7d61b 100644 > --- a/kernel/sched/membarrier.c > +++ b/kernel/sched/membarrier.c > @@ -174,7 +174,6 @@ static int membarrier_private_expedited(int flags) > */ > if (cpu == raw_smp_processor_id()) > continue; > - rcu_read_lock(); > p = rcu_dereference(cpu_rq(cpu)->curr); > if (p && p->mm == mm) > __cpumask_set_cpu(cpu, tmpmask);
Yep. Looks like that solves it! Tested-by: John Stultz <john.stu...@linaro.org> Thanks so much for the quick turnaround! -john
