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From: Peter Zijlstra <peterz@infradead.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Atsushi Tsuji <a-tsuji@bk.jp.nec.com>,
	linux-kernel@vger.kernel.org, Jason Baron <jbaron@redhat.com>,
	Ingo Molnar <mingo@elte.hu>,
	Mathieu Desnoyers <compudj@krystal.dyndns.org>,
	"Frank Ch. Eigler" <fche@redhat.com>,
	Kazuto Miyoshi <miyoshi@linux.bs1.fc.nec.co.jp>,
	rostedt@goodmis.org, linux-mm <linux-mm@kvack.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Nick Piggin <nickpiggin@yahoo.com.au>,
	Hugh Dickins <hugh@veritas.com>,
	Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Subject: Re: [PATCH] Add tracepoints to track pagecache transition
Date: Tue, 17 Feb 2009 12:54:11 +0100	[thread overview]
Message-ID: <1234871651.4744.89.camel@laptop> (raw)
In-Reply-To: <20090217201651.576E.A69D9226@jp.fujitsu.com>

On Tue, 2009-02-17 at 20:38 +0900, KOSAKI Motohiro wrote:
> If you want to see I/O activity, you need to add tracepoint into block
> layer.

We already have that, Arnaldo converted blktrace to use tracepoints and
wrote an ftrace tracer for it.

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  reply	other threads:[~2009-02-17 11:54 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <499A7CAD.9030409@bk.jp.nec.com>
2009-02-17  9:33 ` Peter Zijlstra
2009-02-17 11:04   ` Atsushi Tsuji
2009-02-17 11:38     ` KOSAKI Motohiro
2009-02-17 11:54       ` Peter Zijlstra [this message]
2009-02-17 12:33         ` KOSAKI Motohiro
2009-02-17 14:33       ` Frederic Weisbecker
2009-02-18  0:29         ` KOSAKI Motohiro
2009-02-19  4:41       ` Atsushi Tsuji
2009-02-19 13:12         ` KOSAKI Motohiro
2009-02-19 14:21           ` Lee Schermerhorn
2009-02-20  1:13             ` KOSAKI Motohiro
2009-02-17 15:24     ` Steven Rostedt
2009-02-19 18:51       ` Christoph Hellwig

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