Peter Zijlstra <pet...@infradead.org> writes: > On Wed, Aug 24, 2016 at 05:15:54PM +0300, Alexander Shishkin wrote: >> @@ -221,10 +245,13 @@ static void __bts_event_start(struct perf_event *event) >> >> /* >> * local barrier to make sure that ds configuration made it >> - * before we enable BTS >> + * before we enable BTS and bts::state goes ACTIVE >> */ >> wmb(); >> >> + /* INACTIVE/STOPPED -> ACTIVE */ >> + WRITE_ONCE(bts->state, BTS_STATE_ACTIVE); >> + >> intel_pmu_enable_bts(config); >> >> } > > Alexander, were you going to post a new version of this patch without > the barrier confusion?
Yes, only the testcase exploded again over the weekend, looking at it again. Regards, -- Alex
