From: Andrew Morton <akpm@linux-foundation.org>
To: Harun Scheutzow <harun04@scheutzow.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: vfat file system extreme fragmentation on multiprocessor
Date: Thu, 11 Sep 2008 16:50:39 -0700 [thread overview]
Message-ID: <20080911165039.d129a559.akpm@linux-foundation.org> (raw)
In-Reply-To: <0ML29c-1KdqyO1YV1-0001g5@mrelayeu.kundenserver.de>
On Thu, 11 Sep 2008 20:01:16 +0200
Harun Scheutzow <harun04@scheutzow.de> wrote:
> I like to share the following observation made with different kernels of 2.6.x series
Yeah. ext2 and ext3 also showed major, major, major differences in
layout quality (and hence performance) when switching between
uniprocessor and multiprocessor environments, for the same reason. (UP was
far better).
It was fixed in ext3/4 by the in-core reservations code (recently
ported into ext2 as well).
This is why filesystem performance testing is far from complete if it
is performed only on SMP (or UP) machines.
next prev parent reply other threads:[~2008-09-11 23:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-11 18:01 vfat file system extreme fragmentation on multiprocessor Harun Scheutzow
2008-09-11 19:10 ` Lennart Sorensen
2008-09-11 19:36 ` H. Peter Anvin
2008-09-11 21:09 ` Lennart Sorensen
2008-09-11 21:43 ` H. Peter Anvin
2008-09-11 20:11 ` Harun Scheutzow
2008-09-11 21:20 ` Lennart Sorensen
2008-09-11 23:03 ` Harun Scheutzow
2008-09-11 23:50 ` Andrew Morton [this message]
[not found] <baZfg-1yC-3@gated-at.bofh.it>
[not found] ` <baZS2-2rX-15@gated-at.bofh.it>
2008-09-12 13:19 ` Bodo Eggert
2008-09-12 22:11 ` Harun Scheutzow
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080911165039.d129a559.akpm@linux-foundation.org \
--to=akpm@linux-foundation.org \
--cc=harun04@scheutzow.de \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.