linux-kernel - Re: [PATCH] perf_events: fix bogus warn_on(_once) in perf_prepare

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Date:	Thu, 8 Apr 2010 23:14:15 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org,
	davem@...emloft.net, fweisbec@...il.com, robert.richter@....com,
	perfmon2-devel@...ts.sf.net, eranian@...il.com
Subject: Re: [PATCH] perf_events: fix bogus warn_on(_once) in 
	perf_prepare_sample()

On Thu, Apr 8, 2010 at 11:11 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Thu, 2010-04-08 at 23:08 +0200, Stephane Eranian wrote:
>>
>> Are you suggesting you add some padding the PEBS raw sample you
>> return as PERF_SAMPLE_RAW? Then you need to define what RAW
>> actually means? Seems here, it would mean more than what the
>> HW returns.
>
> Well, RAW doesn't mean anything much at all, its really a fugly pass
> some crap around thing.
>
> So yeah, adding padding seems just fine.
>
I would rather see size as u64. Who's using raw today anyway?

The PEBS record itself is always a multiple of u64. The size header is the one
causing the problems.

>
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