linux-kernel - Re: perf crash with tip/perf/core

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Message-ID: <20160603213705.GC3710@twins.programming.kicks-ass.net>
Date:	Fri, 3 Jun 2016 23:37:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>, Jiri Olsa <jolsa@...nel.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Wang Nan <wangnan0@...wei.com>,
	Andi Kleen <andi@...stfloor.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: perf crash with tip/perf/core

On Fri, Jun 03, 2016 at 06:27:40PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jun 03, 2016 at 06:15:15PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Hi Peter,
> > 
> > 	I built what is in tip/perf/core to test the topdown patches
> > from Andi but it is crashing on me, 'perf stat' was ok, but then I tried
> > 'perf trace' and got the NULL deref below, bet 'perf record' will do the same.
> 
> Yeah, just tried with 'perf record usleep 1'  and got:

Does

lkml.kernel.org/r/1464809585-66072-1-git-send-email-davidcc@...gle.com

fix it?