linux-kernel - Re: [PATCH 3/3] perf record: mmap output file

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Message-ID: <20131015152747.GA15979@gmail.com>
Date:	Tue, 15 Oct 2013 17:27:47 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Mike Galbraith <efault@....de>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 3/3] perf record: mmap output file


* Peter Zijlstra <peterz@...radead.org> wrote:

> On Tue, Oct 15, 2013 at 11:32:45AM -0300, Arnaldo Carvalho de Melo wrote:
> 
> > Jiri and PeterZ probaby will have comments here... ;-) :-)
> 
> The only complication with splice is the vmalloc support; other than 
> that it should be fairly straight fwd.

In the initial version we could skip splice support for vmalloc 
ring-buffer, to keep things simple.

Wanna send a patch for people to try? Looks like there's real interest in 
speeding up perf record as much as possible!

Thanks,

	Ingo
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