linux-kernel - Re: [PATCH] trace: Add tracepoints to fs subsystem

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Message-ID: <1303745985.18763.14.camel@gandalf.stny.rr.com>
Date:	Mon, 25 Apr 2011 11:39:45 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Cc:	Vaibhav Nagarnaik <vnagarnaik@...gle.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Ingo Molnar <mingo@...hat.com>,
	Michael Rubin <mrubin@...gle.com>,
	David Sharp <dhsharp@...gle.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
	Jiaying Zhang <jiayingz@...gle.com>
Subject: Re: [PATCH] trace: Add tracepoints to fs subsystem

On Mon, 2011-04-25 at 11:35 +0900, KOSAKI Motohiro wrote:
> > From: Jiaying Zhang <jiayingz@...gle.com>
> > 
> > Many fs tracepoints can now be traced via ftrace, however there are a
> > few other tracepoints needed. This patch adds entry and exit tracepoints
> > for a few additional functions, viz.:
> > wait_on_buffer
> > block_write_full_page
> > mpage_readpages
> > file_read
> 
> Zero background description?
> 

Good point.

Could you please describe how this is useful, and how one can benefit
from these tracepoints.

-- Steve



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