linux-kernel - Re: [PATCH v1 4/6] perf: Allow using AUX data in perf samples

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Message-ID: <87blv75kmc.fsf@ashishki-desk.ger.corp.intel.com>
Date:   Thu, 26 Sep 2019 15:04:43 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        linux-kernel@...r.kernel.org, jolsa@...hat.com,
        alexander.shishkin@...ux.intel.com
Subject: Re: [PATCH v1 4/6] perf: Allow using AUX data in perf samples

Alexander Shishkin <alexander.shishkin@...ux.intel.com> writes:

> Peter Zijlstra <peterz@...radead.org> writes:
>
>> On Tue, Jun 19, 2018 at 01:47:25PM +0300, Alexander Shishkin wrote:
>>> Right, the SW stuff may then race with event_function_call() stuff. Hmm.
>>> For the HW stuff, I'm hoping that some kind of a sleight of hand may
>>> suffice. Let me think some more.
>>
>> I currently don't see how the SW driven snapshot can ever work, see my
>> comment on the last patch.
>
> Yes, this should be solved by grouping, similarly PEBS->PT.

Peter, do you have any thoughts/suggestions as to this RFC? Thanks!

Regards,
--
Alex