linux-kernel - Re: [RESEND] [PATCH] readahead:add blk_run_backing

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Message-ID: <20090629132841.GA26171@localhost>
Date:	Mon, 29 Jun 2009 21:28:41 +0800
From:	Wu Fengguang <fengguang.wu@...el.com>
To:	Vladislav Bolkhovitin <vst@...b.net>
Cc:	Ronald Moesbergen <intercommit@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"kosaki.motohiro@...fujitsu.com" <kosaki.motohiro@...fujitsu.com>,
	"Alan.Brunelle@...com" <Alan.Brunelle@...com>,
	"hifumi.hisashi@....ntt.co.jp" <hifumi.hisashi@....ntt.co.jp>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	"jens.axboe@...cle.com" <jens.axboe@...cle.com>,
	"randy.dunlap@...cle.com" <randy.dunlap@...cle.com>,
	Bart Van Assche <bart.vanassche@...il.com>
Subject: Re: [RESEND] [PATCH] readahead:add blk_run_backing_dev

On Mon, Jun 29, 2009 at 09:13:27PM +0800, Wu Fengguang wrote:
> On Mon, Jun 29, 2009 at 09:04:57PM +0800, Vladislav Bolkhovitin wrote:
> > Wu Fengguang, on 06/29/2009 04:54 PM wrote:
> > > 
> > > Why not 2.6.30? :)
> > 
> > We started with 2.6.29, so why not complete with it (to save additional 
> > Ronald's effort to move on 2.6.30)?
> 
> OK, that's fair enough.

btw, I backported the 2.6.31 context readahead patches to 2.6.29, just
in case it will help the SCST performance.

Ronald, if you run context readahead, please make sure that the server
side readahead size is bigger than the client side readahead size.

Thanks,
Fengguang

View attachment "readahead-context-2.6.29.patch" of type "text/x-diff" (6652 bytes)