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Date: Fri, 3 Jun 2016 23:37:05 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>, Jiri Olsa <jolsa@kernel.org>,
        David Ahern <dsahern@gmail.com>, Namhyung Kim <namhyung@kernel.org>,
        Wang Nan <wangnan0@huawei.com>, Andi Kleen <andi@firstfloor.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: perf crash with tip/perf/core
Message-ID: <20160603213705.GC3710@twins.programming.kicks-ass.net>
References: <20160603211515.GC3095@kernel.org>
 <20160603212740.GA2963@kernel.org>
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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@google.com

fix it?