Messages in this thread | | | Date | Thu, 23 May 2013 17:26:57 +0200 | From | Peter Zijlstra <> | Subject | Re: WARNING in arch/x86/kernel/cpu/perf_event.c |
| |
On Thu, May 23, 2013 at 10:29:07AM -0400, Vince Weaver wrote: > Hello, > > so now that I got past the OOPS in perf_mmap_close() I re-ran > the fuzzer and quickly encountered the following WARNing. > > It happens here: > > static void x86_pmu_start(struct perf_event *event, int flags) > { > struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); > int idx = event->hw.idx; > > if (WARN_ON_ONCE(!(event->hw.state & PERF_HES_STOPPED))) > return; > > > Is it worth trying to come up with a reproducible case for this one? > > I never know how seriously to take WARN_ON_ONCE dumps.
Its not supposed to happen, you're trying to start an already running event. I'll put it on the todo list.
| |