From: Andi Kleen <andi@firstfloor.org>
To: Fengguang Wu <wfg@mail.ustc.edu.cn>
Cc: Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, Andi Kleen <andi@firstfloor.org>,
Jens Axboe <jens.axboe@oracle.com>,
Oleg Nesterov <oleg@tv-sign.ru>,
Steven Pratt <slpratt@austin.ibm.com>,
Ram Pai <linuxram@us.ibm.com>
Subject: Re: [PATCH 8/9] readahead: convert ext3/ext4 invocations
Date: Sat, 19 May 2007 14:19:56 +0200 [thread overview]
Message-ID: <20070519121956.GD25563@one.firstfloor.org> (raw)
In-Reply-To: <20070516224819.281192313@mail.ustc.edu.cn>
On Thu, May 17, 2007 at 06:48:00AM +0800, Fengguang Wu wrote:
> Convert ext3/ext4 dir reads to use on-demand readahead.
>
> Readahead for dirs operates _not_ on file level, but on blockdev level.
> This makes a difference when the data blocks are not continuous.
> And the read routine is somehow opaque: there's no handy info about the status
> of current page. So a simplified call scheme is employed: to call into
> readahead whenever the current page falls out of readahead windows.
ext2 too would be nice. Also when it goes in it might be worth
contacting linux-fsdevel with a quick pointer to this so that other
file systems can possibly benefit too.
-Andi
next prev parent reply other threads:[~2007-05-19 12:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-16 22:47 [PATCH 0/9] on-demand readahead Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 1/9] readahead: introduce PG_readahead Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-19 6:28 ` Andrew Morton
2007-05-19 11:35 ` Andi Kleen
2007-05-19 15:19 ` Andrew Morton
2007-05-19 12:30 ` Fengguang Wu
2007-05-19 12:30 ` Fengguang Wu
2007-05-19 15:25 ` Andrew Morton
2007-05-20 3:09 ` Fengguang Wu
2007-05-20 3:09 ` Fengguang Wu
2007-05-20 7:10 ` Christoph Lameter
2007-06-12 1:04 ` Rusty Russell
2007-06-12 2:52 ` Fengguang Wu
2007-06-12 2:52 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 2/9] readahead: add look-ahead support to __do_page_cache_readahead() Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 3/9] readahead: MIN_RA_PAGES/MAX_RA_PAGES macros Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 4/9] readahead: data structure and routines Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-06-12 3:30 ` Rusty Russell
2007-06-12 12:07 ` Fengguang Wu
2007-06-12 12:07 ` Fengguang Wu
2007-06-13 0:27 ` Rusty Russell
2007-06-13 3:07 ` Fengguang Wu
2007-06-13 3:07 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 5/9] readahead: on-demand readahead logic Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-19 6:23 ` Andrew Morton
2007-05-19 13:02 ` Fengguang Wu
2007-05-19 13:02 ` Fengguang Wu
2007-06-12 4:36 ` Rusty Russell
2007-06-12 10:35 ` Fengguang Wu
2007-06-12 10:35 ` Fengguang Wu
2007-06-13 1:40 ` Rusty Russell
2007-06-13 4:00 ` Fengguang Wu
2007-06-13 4:00 ` Fengguang Wu
2007-06-13 5:51 ` Rusty Russell
2007-06-13 7:07 ` Fengguang Wu
2007-06-13 7:07 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 6/9] readahead: convert filemap invocations Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-16 22:47 ` [PATCH 7/9] readahead: convert splice invocations Fengguang Wu
2007-05-16 22:47 ` Fengguang Wu
2007-05-16 22:48 ` [PATCH 8/9] readahead: convert ext3/ext4 invocations Fengguang Wu
2007-05-16 22:48 ` Fengguang Wu
2007-05-19 12:19 ` Andi Kleen [this message]
2007-05-16 22:48 ` [PATCH 9/9] readahead: remove the old algorithm Fengguang Wu
2007-05-16 22:48 ` Fengguang Wu
2007-05-19 12:18 ` Andi Kleen
2007-05-19 13:17 ` Fengguang Wu
2007-05-19 13:17 ` Fengguang Wu
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