Date: Thu, 26 Nov 2009 09:44:43 +0100
From: Ingo Molnar <mingo@elte.hu>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>, Steven Rostedt <rostedt@goodmis.org>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 6/9] tracing: Convert some block events to DEFINE_EVENT
Message-ID: <20091126084443.GA1389@elte.hu>
References: <4B0E2807.4060102@cn.fujitsu.com>
 <4B0E28E6.7060609@cn.fujitsu.com>
 <20091126083621.GM8742@kernel.dk>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20091126083621.GM8742@kernel.dk>
User-Agent: Mutt/1.5.20 (2009-08-17)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1097
Lines: 28


* Jens Axboe <jens.axboe@oracle.com> wrote:

> On Thu, Nov 26 2009, Li Zefan wrote:
> > use TRACE_EVENT_TEMPLATE to remove duplicate code:
> > 
> >    text    data     bss     dec     hex filename
> >   53570    3284     184   57038    dece block/blk-core.o.old
> >   43702    3284     144   47130    b81a block/blk-core.o
> 
> Nice! When I played with the writeback tracing, I did notice that code
> bloat does get pretty severe quickly.
> 
> I have applied this to for-2.6.33, thanks a lot.

Note that it wont build in your tree, because the TRACE_EVENT_TEMPLATE / 
DEFINE_EVENT facility this relies on is not upstream yet.

The events are not affected in any way (and block/* is not modified) - 
it's just a more efficient representation of the same. I've applied them 
to -tip, to keep the facility and dependent updates in a single place.

	Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/