From: Matthias Andree <matthias.andree@stud.uni-dortmund.de>
To: linux-kernel@vger.kernel.org, reiserfs-list@namesys.com
Subject: Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better
Date: Tue, 25 Sep 2001 12:44:40 +0200 [thread overview]
Message-ID: <20010925124440.B1390@emma1.emma.line.org> (raw)
In-Reply-To: <20010925044949.JNOU8313.femail42.sdc1.sfba.home.com@there> <Pine.LNX.4.30.0109251335520.18440-100000@gamma.student.ljbc>
In-Reply-To: <Pine.LNX.4.30.0109251335520.18440-100000@gamma.student.ljbc>
On Tue, 25 Sep 2001, Beau Kuiper wrote:
> I can imagine how it improves sequenial write performace too. With the
> write cache off, the computer cannot send another write request to the IDE
> device until the last one had finished. By the time the computer is told
> the request was finished and it has sent a new request to the drive, the
> disk would have spun out of the place it was supposed to be placed. The
> drive will then have to wait for the disk to spin around fully again
> before doing the write. With the write cache enabled, several requests can
> be placed into the drive buffer and written in the single revolution of
> the drive.
Might be an explanation. How big are the chunks of data that the
kernel sends to the disk?
--
Matthias Andree
"Those who give up essential liberties for temporary safety deserve
neither liberty nor safety." - Benjamin Franklin
next prev parent reply other threads:[~2001-09-25 10:44 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-24 14:09 Beau Kuiper
2001-09-24 14:46 ` [reiserfs-list] " Chris Mason
2001-09-24 15:32 ` Matthias Andree
2001-09-24 15:45 ` Alan Cox
2001-09-24 15:47 ` Matthias Andree
2001-09-24 16:08 ` Alan Cox
2001-09-24 16:08 ` [reiserfs-list] " Chris Dukes
2001-09-24 16:54 ` Matthias Andree
2001-09-24 16:15 ` Nicholas Knight
2001-09-24 16:40 ` [reiserfs-list] " Lehmann
2001-09-24 16:53 ` Matthias Andree
2001-09-24 16:57 ` [reiserfs-list] " Lehmann
2001-09-25 14:04 ` bill davidsen
2001-09-25 17:39 ` bill davidsen
2001-09-24 20:05 ` Nicholas Knight
2001-09-25 0:11 ` Matthias Andree
2001-09-25 4:49 ` Nicholas Knight
2001-09-25 6:00 ` Beau Kuiper
2001-09-25 6:17 ` Nicholas Knight
2001-09-25 10:44 ` Matthias Andree [this message]
2001-09-25 11:01 ` ben-lists
2001-09-25 10:42 ` Matthias Andree
2001-09-25 11:07 ` Nicholas Knight
2001-09-25 14:47 ` Alex Bligh - linux-kernel
2001-09-25 15:13 ` Matthias Andree
2001-09-25 15:23 ` John Alvord
2001-09-25 22:41 ` bill davidsen
2001-09-25 12:54 ` Jorge Nerín
2001-09-25 13:17 ` Matthias Andree
2001-09-25 13:06 ` [reiserfs-list] " Chris Mason
2001-09-24 21:58 Dieter Nützel
2001-09-25 0:19 ` Matthias Andree
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