linux-kernel - Re: [PATCH v6 15/18] perf: add PERF_RECORD_MISC_MMAP_DATA to RECORD

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Message-ID: <20130118232543.GN4051@tassilo.jf.intel.com>
Date:	Fri, 18 Jan 2013 15:25:43 -0800
From:	Andi Kleen <ak@...ux.intel.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	acme@...hat.com, jolsa@...hat.com, namhyung.kim@....com
Subject: Re: [PATCH v6 15/18] perf: add PERF_RECORD_MISC_MMAP_DATA to
 RECORD_MMAP

On Tue, Jan 15, 2013 at 04:39:43PM +0100, Stephane Eranian wrote:
> Type of mapping was lost and made it hard for a tool
> to distinguish code vs. data mmaps. Perf has the ability
> to distinguish the two.
> 
> Use a bit in the header->misc bitmask to keep track of
> the mmap type. If PERF_RECORD_MISC_MMAP_DATA is set then
> the mapping is not executable (!VM_EXEC). If not set, then
> the mapping is executable.
> 
> Signed-off-by: Stephane Eranian <eranian@...gle.com>

Acked-by: Andi Kleen <ak@...ux.intel.com>

-Andi
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