linux-kernel - Re: [PATCH 08/12] perf: Carve out mmap helpers for general use

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Date:	Mon, 24 Jan 2011 10:04:10 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Arnaldo Carvalho de Melo <acme@...radead.org>
Cc:	Borislav Petkov <bp@...64.org>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"tony.luck@...el.com" <tony.luck@...el.com>,
	"rostedt@...dmis.org" <rostedt@...dmis.org>,
	"fweisbec@...il.com" <fweisbec@...il.com>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 08/12] perf: Carve out mmap helpers for general use

On Fri, Jan 21, 2011 at 12:29:37PM -0500, Arnaldo Carvalho de Melo wrote:
> Em Fri, Jan 21, 2011 at 04:09:31PM +0100, Borislav Petkov escreveu:
> > From: Borislav Petkov <borislav.petkov@....com>
> > 
> > Export the mmap_read* helpers into tools/lib/perf/mmap.[ch]
> 
> Borislav, can you take a look at:
> 
> http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=shortlog;h=refs/heads/perf/core
> 
> More specifically take a look at the function test__basic_mmap in:
> 
> http://git.kernel.org/?p=linux/kernel/git/acme/linux-2.6.git;a=blob;f=tools/perf/builtin-test.c;h=f03798a298b00b328a11f06ce20cc352d123ec28;hb=refs/heads/perf/core
> 
> 434 /*
> 435  * This test will generate random numbers of calls to some getpid syscalls,
> 436  * then establish an mmap for a group of events that are created to monitor
> 437  * the syscalls.
> 438  *
> 439  * It will receive the events, using mmap, use its PERF_SAMPLE_ID generated
> 440  * sample.id field to map back to its respective perf_evsel instance.
> 441  *
> 442  * Then it checks if the number of syscalls reported as perf events by
> 443  * the kernel corresponds to the number of syscalls made.
> 444  */

Ok, I see at least one problem with my patch - you've reworked the
mmaping functionality in evlist.c/evsel.c and I should use it too, I
guess. For that, I think you'd want me to apply my stuff ontop of your
perf/core branch, right?

Am I missing something else?

Thanks.

-- 
Regards/Gruss,
Boris.

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