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Date: Sun, 24 May 2009 04:57:01 -0400
From: Christoph Hellwig <hch@infradead.org>
To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Christoph Hellwig <hch@infradead.org>, 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>
Subject: Re: [RFC][PATCH] convert block trace points to TRACE_EVENT()
Message-ID: <20090524085701.GA4302@infradead.org>
References: <4A13C19E.3000303@cn.fujitsu.com> <20090523124018.GA15163@infradead.org> <20090524141347.0841.A69D9226@jp.fujitsu.com>
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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.