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Date: Thu, 3 Aug 2017 14:04:17 -0400 (EDT) From: Vince Weaver <vincent.weaver@...ne.edu> To: Peter Zijlstra <peterz@...radead.org> cc: linux-kernel@...r.kernel.org, Andy Lutomirski <luto@...nel.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Stephane Eranian <eranian@...il.com> Subject: Re: perf: bug in rdpmc/mmap accounting after exec On Wed, 2 Aug 2017, Peter Zijlstra wrote: > On Wed, Jul 26, 2017 at 03:39:01PM -0400, Vince Weaver wrote: > > In fact, current->mm->context.perf_rdpmc_allowed goes negative which seems > > like it shouldn't happen? > > Good find that... > > The below seems to fix that for me. yes, I can confirm that with this patch all of the various PAPI and perf_event_tests pass on my test system. Thanks, Vince
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