linux-kernel - Re: [PATCH v5 12/20] x86: perf: intel

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Message-ID: <20141022141755.GP12706@worktop.programming.kicks-ass.net>
Date:	Wed, 22 Oct 2014 16:17:55 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc:	Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
	Robert Richter <rric@...nel.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>, kan.liang@...el.com,
	adrian.hunter@...el.com, acme@...radead.org
Subject: Re: [PATCH v5 12/20] x86: perf: intel_pt: Intel PT PMU driver

On Mon, Oct 13, 2014 at 04:45:40PM +0300, Alexander Shishkin wrote:
> +/**
> + * struct pt_buffer - buffer configuration; one buffer per task_struct or
  - * cpu, depending on perf event configuration
  + *                    cpu, depending on perf event configuration
> + * @tables: list of ToPA tables in this buffer
> + * @first, @last: shorthands for first and last topa tables
> + * @cur: current topa table
> + * @nr_pages: buffer size in pages
> + * @cur_idx: current output region's index within @cur table
> + * @output_off: offset within the current output region
> + * @data_size: running total of the amount of data in this buffer
> + * @lost: if data was lost/truncated
> + * @head: logical write offset inside the buffer
> + * @snapshot: if this is for a snapshot/overwrite counter
> + * @stop_pos, @intr_pos: STOP and INT topa entries in the buffer
> + * @data_pages: array of pages from perf
> + * @topa_index: table of topa entries indexed by page offset
> + */
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