linux-kernel - Re: [RFC 2/2] perf: add AUX area to ring buffer for raw data streams

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Message-ID: <20140605115829.GA29720@gmail.com>
Date:	Thu, 5 Jun 2014 13:58:29 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [RFC 2/2] perf: add AUX area to ring buffer for raw data streams


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

> @@ -300,6 +300,7 @@ struct pmu {
>   * struct pmu::capabilities flags
>   */
>  #define PERF_PMU_CAP_NO_INTERRUPT	1
> +#define PERF_PMU_CAP_AUX_BROKEN_SG	2

Btw., I'd name it PERF_PMU_AUX_PHYSICAL_SG or so, and add a comment 
before it that explains that such hardware interfaces are restrictive, 
or so.

Thanks,

	Ingo
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