linux-kernel - Re: perf: fuzzer WARNING event_function

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Message-ID: <20160816170342.GM30192@twins.programming.kicks-ass.net>
Date:	Tue, 16 Aug 2016 19:03:42 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: perf: fuzzer WARNING event_function_local.constprop

On Tue, Aug 16, 2016 at 12:17:27PM -0400, Vince Weaver wrote:
> On Tue, 16 Aug 2016, Peter Zijlstra wrote:
> 
> > Could you see if the below cures things?
> > 
> > ---
> >  kernel/events/core.c | 60 +++++++++++++++++++++++++++++++++++++++++-----------
> >  1 file changed, 48 insertions(+), 12 deletions(-)
> 
> yes, it seems to fix things, or at least my reliable test case no longer 
> will trigger it.

Awesome, I'll go write a Changelog and such.

Meanwhile I found a livelock in ftrace-perf, once I get that sorted I'll
go look at the other things you reported.