From: Rusty Russell <rusty@rustcorp.com.au>
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 1/9] readahead: introduce PG_readahead
Date: Tue, 12 Jun 2007 11:04:54 +1000 [thread overview]
Message-ID: <1181610294.16428.133.camel@localhost.localdomain> (raw)
In-Reply-To: <20070516224818.246719596@mail.ustc.edu.cn>
On Thu, 2007-05-17 at 06:47 +0800, Fengguang Wu wrote:
> plain text document attachment (mm-introduce-pg_readahead.patch)
> Introduce a new page flag: PG_readahead.
>
> It acts as a look-ahead mark, which tells the page reader:
> Hey, it's time to invoke the read-ahead logic. For the sake of I/O pipelining,
> don't wait until it runs out of cached pages!
Hi Fengguang!
I've been reading your patches, and I have some (possibly dumb!)
questions.
For this patch: why set a bit in the page, rather than keep a value
inside the "struct file_ra_state"?
Thanks,
Rusty.
next prev parent reply other threads:[~2007-06-12 1:05 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 [this message]
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
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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