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Date: Sun, 24 May 2009 22:47:31 +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>,
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       Frederic Weisbecker <fweisbec@gmail.com>,
       Tom Zanussi <tzanussi@gmail.com>, "Theodore Ts'o" <tytso@mit.edu>,
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> On Sun, May 24, 2009 at 02:15:05PM +0900, KOSAKI Motohiro wrote:
> > > 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? 
> 
> blktrace(8) uses the ioctl interface, which we should keep for a long
> time for backwards compatiblity.  

Ah, I misunderstand your point. sorry.
I though you suggested to remove ioctl. but it's reverse. ok. :)

So, I guess same formatting make easy understanding for administrator, maybe.