From: Fengguang Wu <wfg@mail.ustc.edu.cn>
To: Voluspa <lista1@comhem.se>
Cc: akpm@osdl.org, arjan@infradead.org, Valdis.Kletnieks@vt.edu,
diegocg@gmail.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] readahead: initial method - expected read size - fix fastcall
Date: Thu, 8 Jun 2006 16:50:55 +0800 [thread overview]
Message-ID: <349756654.19100@ustc.edu.cn> (raw)
Message-ID: <20060608085055.GA5917@mail.ustc.edu.cn> (raw)
In-Reply-To: <20060608102802.6e07b148.lista1@comhem.se>
On Thu, Jun 08, 2006 at 10:28:02AM +0200, Voluspa wrote:
> On Thu, 8 Jun 2006 16:13:52 +0800 Fengguang Wu wrote:
> > It's interesting that copying of sparse file is more efficient with small
> > readahead size :) I get the same conclusion, though with smaller differences:
>
> How on earth can you copy the file without overwriting the target /dev/null?
Yes, it worked as expected. All the time.
I'm running zsh, though bash is also tested ok.
% cp --version
cp (GNU coreutils) 5.96
Copyright (C) 2006 Free Software Foundation, Inc.
Wu
next prev parent reply other threads:[~2006-06-08 8:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-04 7:34 [PATCH] readahead: initial method - expected read size - fix fastcall Fengguang Wu
2006-06-04 7:34 ` Fengguang Wu
2006-06-04 9:07 ` Andrew Morton
2006-06-04 9:25 ` Arjan van de Ven
2006-06-05 1:17 ` Voluspa
2006-06-05 8:00 ` Arjan van de Ven
2006-06-06 2:26 ` Fengguang Wu
2006-06-06 2:26 ` Fengguang Wu
2006-06-08 7:31 ` Voluspa
2006-06-08 7:57 ` Fengguang Wu
2006-06-08 7:57 ` Fengguang Wu
2006-06-06 2:57 ` Fengguang Wu
2006-06-06 2:57 ` Fengguang Wu
2006-06-08 7:43 ` Voluspa
2006-06-08 8:13 ` Fengguang Wu
2006-06-08 8:13 ` Fengguang Wu
2006-06-08 8:28 ` Voluspa
2006-06-08 8:50 ` Fengguang Wu [this message]
2006-06-08 8:50 ` Fengguang Wu
2006-06-08 10:04 ` Voluspa
2006-06-04 12:13 ` [PATCH] readahead: call scheme - fix fastcall readahead_cache_hit() Fengguang Wu
2006-06-04 12:13 ` Fengguang Wu
-- strict thread matches above, loose matches on Subject: below --
2006-05-30 3:36 Adaptive Readahead V14 - statistics question Voluspa
2006-05-30 6:40 ` Wu Fengguang
2006-05-30 6:40 ` Wu Fengguang
2006-05-30 16:49 ` Valdis.Kletnieks
2006-05-31 21:06 ` Diego Calleja
2006-05-31 21:50 ` Voluspa
2006-06-01 5:51 ` Fengguang Wu
2006-06-01 5:51 ` Fengguang Wu
2006-06-01 6:35 ` Voluspa
2006-06-08 8:04 ` Voluspa
2006-06-08 11:37 ` adaptive readahead overheads Fengguang Wu
2006-06-08 11:37 ` Fengguang Wu
2006-06-08 12:25 ` Voluspa
2006-06-08 12:39 ` Fengguang Wu
2006-06-08 12:39 ` Fengguang Wu
2006-06-08 13:05 ` Andi Kleen
2006-06-08 14:00 ` Jens Axboe
[not found] ` <448493E9.9030203@samwel.tk>
2006-06-06 3:34 ` Adaptive Readahead V14 - statistics question Wu Fengguang
2006-06-06 3:34 ` Wu Fengguang
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