From: Wu Fengguang <wfg@mail.ustc.edu.cn>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "Ph. Marek" <philipp.marek@bmlv.gv.at>,
Linus Torvalds <torvalds@osdl.org>, Linda Walsh <lkml@tlinx.org>,
linux-kernel@vger.kernel.org, Andrew Morton <akpm@osdl.org>,
Jens Axboe <axboe@suse.de>, Nick Piggin <nickpiggin@yahoo.com.au>,
Badari Pulavarty <pbadari@us.ibm.com>
Subject: Re: [RFC] kernel facilities for cache prefetching
Date: Thu, 4 May 2006 20:14:54 +0800 [thread overview]
Message-ID: <346744890.14268@ustc.edu.cn> (raw)
Message-ID: <20060504121454.GB6008@mail.ustc.edu.cn> (raw)
In-Reply-To: <1146728004.3101.17.camel@laptopd505.fenrus.org>
On Thu, May 04, 2006 at 09:33:24AM +0200, Arjan van de Ven wrote:
>
>
> > Ascending block numbers on disk can be read very fast, as the disk needs no or
> > less seeking. That's even true for stripes and mirrors. (I grant you that
> > there are complicated setups out there, but these could be handled similar.)
> >
>
>
> btw this all really spells out that you may want to do this as a device
> mapper thing; eg have a device mapper module that can do "lookaside" to
> a different order/mirror block whatever. The filesystem just doesn't
> want to know; do it at the DM level ;) That also solves the entire
> caching layering problem etc ;)
I guess some big corps might want to install such a layer into their
storage products ;)
next prev parent reply other threads:[~2006-05-04 12:39 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-02 7:50 [RFC] kernel facilities for cache prefetching Wu Fengguang
2006-05-02 7:50 ` Wu Fengguang
2006-05-02 12:46 ` Diego Calleja
2006-05-02 14:42 ` Wu Fengguang
2006-05-02 14:42 ` Wu Fengguang
2006-05-02 16:07 ` Diego Calleja
2006-05-03 6:45 ` Wu Fengguang
2006-05-03 6:45 ` Wu Fengguang
2006-05-03 18:14 ` Diego Calleja
2006-05-03 23:39 ` Zan Lynx
2006-05-04 1:37 ` Diego Calleja
2006-05-02 15:55 ` Linus Torvalds
2006-05-02 16:35 ` Andi Kleen
2006-05-03 4:11 ` Wu Fengguang
2006-05-03 4:11 ` Wu Fengguang
2006-05-03 17:28 ` Badari Pulavarty
[not found] ` <346733486.30800@ustc.edu.cn>
2006-05-04 15:03 ` Linus Torvalds
2006-05-04 16:57 ` Badari Pulavarty
2006-05-05 14:44 ` Wu Fengguang
2006-05-05 14:44 ` Wu Fengguang
2006-05-03 7:13 ` Wu Fengguang
2006-05-03 7:13 ` Wu Fengguang
2006-05-03 12:59 ` Nikita Danilov
2006-05-03 22:20 ` Rik van Riel
2006-05-06 1:11 ` Wu Fengguang
2006-05-06 1:11 ` Wu Fengguang
2006-05-04 0:28 ` Linda Walsh
2006-05-04 1:31 ` Linus Torvalds
2006-05-04 7:08 ` Ph. Marek
2006-05-04 7:33 ` Arjan van de Ven
2006-05-04 12:14 ` Wu Fengguang [this message]
2006-05-04 12:14 ` Wu Fengguang
2006-05-04 12:34 ` Arjan van de Ven
2006-05-03 21:45 ` Linda Walsh
2006-05-04 12:12 ` Wu Fengguang
2006-05-04 12:12 ` Wu Fengguang
2006-05-04 18:57 ` Linda Walsh
2006-05-05 15:20 ` Wu Fengguang
2006-05-05 15:20 ` Wu Fengguang
2006-05-04 9:02 ` Helge Hafting
2006-05-02 7:58 ` Arjan van de Ven
2006-05-02 8:06 ` Wu Fengguang
2006-05-02 8:06 ` Wu Fengguang
2006-05-02 8:30 ` Arjan van de Ven
2006-05-02 8:53 ` Wu Fengguang
2006-05-02 8:53 ` Wu Fengguang
2006-05-06 6:49 ` Denis Vlasenko
2006-05-02 8:55 ` Arjan van de Ven
2006-05-02 11:39 ` Jan Engelhardt
2006-05-02 11:48 ` Wu Fengguang
2006-05-02 11:48 ` Wu Fengguang
2006-05-02 22:03 ` Dave Jones
2006-05-02 8:09 ` Jens Axboe
2006-05-02 8:20 ` Wu Fengguang
2006-05-02 8:20 ` Wu Fengguang
2006-05-03 22:05 ` Benjamin LaHaise
2006-05-02 19:10 ` Pavel Machek
2006-05-02 23:36 ` Nigel Cunningham
2006-05-03 2:35 ` Wu Fengguang
2006-05-03 2:35 ` Wu Fengguang
2006-05-03 2:32 ` Wu Fengguang
2006-05-03 2:32 ` Wu Fengguang
2006-05-03 7:19 ` Wu Fengguang
2006-05-03 7:19 ` Wu Fengguang
2006-05-04 12:28 ` Wu Fengguang
2006-05-04 12:28 ` Wu Fengguang
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