From: Ingo Oeser <ioe-lkml@rameria.de>
To: Wu Fengguang <wfg@mail.ustc.edu.cn>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 23/32] readahead: seeking reads method
Date: Sun, 28 May 2006 00:04:31 +0200 [thread overview]
Message-ID: <200605280004.32941.ioe-lkml@rameria.de> (raw)
In-Reply-To: <348745096.16246@ustc.edu.cn>
Hello,
On Saturday, 27. May 2006 17:49, Wu Fengguang wrote:
> Readahead policy on read after seeking.
>
> It tries to detect sequences like:
> seek(), 5*read(); seek(), 6*read(); seek(), 4*read(); ...
This is basically "fast forward" and "fast backward" of media players.
Did you try some tests with that? Hard disk recording people will love you.
Just watch a nice movies while testing this and you can enjoy both:
Your work succeeding and jumping around in a good movie :-)
Regards
Ingo Oeser
next prev parent reply other threads:[~2006-05-27 22:08 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060527154849.927021763@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 00/32] Adaptive readahead V14 Wu Fengguang
2006-05-27 17:29 ` Michael Tokarev
[not found] ` <20060528120815.GB6478@mail.ustc.edu.cn>
2006-05-28 12:08 ` Wu Fengguang
2006-05-28 19:23 ` Michael Tokarev
[not found] ` <20060529030152.GA5994@mail.ustc.edu.cn>
2006-05-29 3:01 ` Wu Fengguang
2006-05-30 9:23 ` Jens Axboe
[not found] ` <20060530113221.GA8665@mail.ustc.edu.cn>
2006-05-30 11:32 ` Wu Fengguang
2006-05-30 12:29 ` Jens Axboe
[not found] ` <20060530143417.GA9126@mail.ustc.edu.cn>
2006-05-30 14:34 ` Wu Fengguang
[not found] ` <20060527155125.911021581@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 01/32] readahead: kconfig options Wu Fengguang
[not found] ` <20060527155127.522802387@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 04/32] mm: introduce PG_readahead Wu Fengguang
[not found] ` <20060527155128.472551240@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 06/32] readahead: delay page release in do_generic_mapping_read() Wu Fengguang
[not found] ` <20060527155129.001886224@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 07/32] readahead: insert cond_resched() calls Wu Fengguang
[not found] ` <20060527155129.653903854@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 08/32] readahead: {MIN,MAX}_RA_PAGES Wu Fengguang
[not found] ` <20060527155130.013773601@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 09/32] readahead: events accounting Wu Fengguang
[not found] ` <20060527155130.538411854@localhost.localdomain>
2006-05-27 15:48 ` [PATCH 10/32] readahead: rescue_pages() Wu Fengguang
[not found] ` <20060527155131.200177171@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 11/32] readahead: sysctl parameters Wu Fengguang
[not found] ` <20060527155132.649338979@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 14/32] readahead: state based method - routines Wu Fengguang
[not found] ` <20060527155133.216888332@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 15/32] readahead: state based method Wu Fengguang
[not found] ` <20060527155134.715578802@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 18/32] readahead: initial method - thrashing guard size Wu Fengguang
[not found] ` <20060527155135.584918734@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 20/32] readahead: initial method - user recommended size Wu Fengguang
[not found] ` <20060527155136.503037461@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 22/32] readahead: backward prefetching method Wu Fengguang
[not found] ` <20060527155137.552915509@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 24/32] readahead: thrashing recovery method Wu Fengguang
2006-05-27 22:04 ` Ingo Oeser [this message]
[not found] ` <20060527155138.046726658@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 25/32] readahead: call scheme Wu Fengguang
[not found] ` <20060527155138.454809673@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 26/32] readahead: laptop mode Wu Fengguang
[not found] ` <20060527155140.035991503@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 27/32] readahead: loop case Wu Fengguang
[not found] ` <20060527155141.697607086@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 30/32] readahead: debug radix tree new functions Wu Fengguang
[not found] ` <20060527155142.129761018@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 31/32] readahead: debug traces showing accessed file names Wu Fengguang
[not found] ` <20060527155142.715530234@localhost.localdomain>
2006-05-27 15:49 ` [PATCH 32/32] readahead: debug traces showing read patterns Wu Fengguang
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