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Date: Sun, 24 May 2009 14:15:05 +0900 (JST)
From: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
To: Christoph Hellwig <hch@infradead.org>
Subject: Re: [RFC][PATCH] convert block trace points to TRACE_EVENT()
Cc: kosaki.motohiro@jp.fujitsu.com, Li Zefan <lizf@cn.fujitsu.com>,
       Jeff Moyer <jmoyer@redhat.com>, Ingo Molnar <mingo@elte.hu>,
       Jens Axboe <jens.axboe@oracle.com>,
       Steven Rostedt <rostedt@goodmis.org>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       Tom Zanussi <tzanussi@gmail.com>, "Theodore Ts'o" <tytso@mit.edu>,
       Steven Whitehouse <swhiteho@redhat.com>,
       LKML <linux-kernel@vger.kernel.org>
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> On Wed, May 20, 2009 at 04:38:54PM +0800, Li Zefan wrote:
> > Yes, this patch doesn't affect ioctl-based blktrace or ftrace-plugin
> > blktrace at all.
> 
> Is there any good reason for keeping the ftrace plugin once we have
> the fully function event tracer support for the block events?

waiting userland blktrace tool convert using event tracer? 

just guess :-)