linux-kernel - Re: [BUG] perf tests: Test converting perf time to TSC

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Message-ID: <524D2E06.5020801@intel.com>
Date:	Thu, 03 Oct 2013 11:42:46 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [BUG] perf tests: Test converting perf time to TSC

On 03/10/13 11:17, Jiri Olsa wrote:
> On Wed, Oct 02, 2013 at 04:46:59PM +0300, Adrian Hunter wrote:
>> On 02/10/13 16:23, Jiri Olsa wrote:
>>> hi,
>>> got a segfault in the tsc test on latest acme's tree.
>>>
>>> I'm dealing with some other issues right now, so just reporting ;-)
>>
>> The capability bits have changed positions.  You need to have:
>>
>> commit fa7315871046b9a4c48627905691dbde57e51033
>> Author: Peter Zijlstra <peterz@...radead.org>
>> Date:   Thu Sep 19 10:16:42 2013 +0200
>>
>>     perf: Fix capabilities bitfield compatibility in 'struct
>> perf_event_mmap_page'
> 
> ok, I'll try that.. but anyway, the test should
> not crash in account of missing kernel change 

No the ABI is broken in that case - better to crash.


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