linux-kernel - Re: ext3 IO latency measurements (was: Linux 2.6.29)

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Message-ID: <20090326185424.6de0ba1b@lxorguk.ukuu.org.uk>
Date:	Thu, 26 Mar 2009 18:54:24 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Bill Nottingham <notting@...hat.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Theodore Tso <tytso@....edu>, Ingo Molnar <mingo@...e.hu>,
	Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...radead.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Nick Piggin <npiggin@...e.de>,
	Jens Axboe <jens.axboe@...cle.com>,
	David Rees <drees76@...il.com>, Jesper Krogh <jesper@...gh.cc>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Roland McGrath <roland@...hat.com>
Subject: Re: ext3 IO latency measurements (was: Linux 2.6.29)

On Thu, 26 Mar 2009 13:32:38 -0400
Bill Nottingham <notting@...hat.com> wrote:

> Linus Torvalds (torvalds@...ux-foundation.org) said: 
> > And quite frankly, even if you then _manually_ put 'relatime' in 
> > /etc/fstab, the default Fedora install will totally ignore it. Why? 
> > Because it mounts the root partition while using initrd, and totally 
> > ignores /etc/fstab.
> 
> It should honor /etc/fstab changes, if the initramfs is rebuilt
> after the change is made. If it doesn't, that's a bug.

Surely it should also look at the real /etc/fstab after mounting root r/o
and then flip the options needed so you don't have to.
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