On Wed, Aug 12, 2015 at 09:49:40AM -0400, Vince Weaver wrote: > On Wed, 12 Aug 2015, tip-bot for Peter Zijlstra wrote: > > > Commit-ID: c7999c6f3fed9e383d3131474588f282ae6d56b9 > > Gitweb: http://git.kernel.org/tip/c7999c6f3fed9e383d3131474588f282ae6d56b9 > > Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > AuthorDate: Tue, 4 Aug 2015 19:22:49 +0200 > > Committer: Ingo Molnar <mingo@xxxxxxxxxx> > > CommitDate: Wed, 12 Aug 2015 11:37:22 +0200 > > > > perf: Fix PERF_EVENT_IOC_PERIOD migration race > > > > I ran the perf fuzzer, which triggered some WARN()s which are due to > > trying to stop/restart an event on the wrong CPU. > > Do you have a list of which WARNs this should fix? Just so I can > update my bug tracker. I think this triggered: arch/x86/kernel/cpu/perf_event.c:x86_pmu_del() if (WARN_ON_ONCE(i == cpuc->n_events)) /* called ->del() without ->add() ? */ Through perf_ioctl()->perf_event_period(). I didn't safe a copy of the exact backtrace. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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