linux-kernel - Re: [PATCH] perf session: Fix infinite loop on invalid perf.data file

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Date:	Tue, 01 Oct 2013 10:59:06 -0600
From:	David Ahern <dsahern@...il.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Ingo Molnar <mingo@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>, Sonny Rao <sonnyrao@...omium.org>
Subject: Re: [PATCH] perf session: Fix infinite loop on invalid perf.data
 file

On 10/1/13 10:54 AM, Arnaldo Carvalho de Melo wrote:
> Em Tue, Oct 01, 2013 at 05:33:09PM +0200, Ingo Molnar escreveu:
>>
>> * David Ahern <dsahern@...il.com> wrote:
>>
>>> On 10/1/13 8:21 AM, Ingo Molnar wrote:
>>>> But if I understood it correctly this particular message could trigger for
>>>> regular users of perf as well, of the perf record is terminated in some
>>>> unusual fashion. Regular users might not have the perf code handy (and
>>>> might not know about git grep either).
>>>
>>> This is the case I was referring to -- normal users don't care about
>>> the code reference, hence the more specific question about how the
>>> perf-record session ended.
>>
>> Hm, what do you call 'code reference'?
>>
>> The message I suggested is:
>>
>>    WARNING: perf/header: Data size is 0. Was the 'perf record' command properly terminated?
>>
>> I didn't intend 'perf/header' to be a code reference - it wanted to refer
>> to the perf.data header. Maybe that should be formulated in a less
>> confusing manner? Something like:
>
> I liked this last one:
>
>>    WARNING: The perf.data file's data size field is 0 which is unexpected.
>>             Was the 'perf record' command properly terminated?
>
> Can I patch that up into Namhyung's latest patch?
>
> Sonny, David, from your replies I think I can add Tested-by: tags for
> both of you?

I'm fine with the last message. And yes a Tested by

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