linux-kernel - Re: [PATCH 2/2] Make relatime default

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Message-ID: <20090409220043.GD3269@elf.ucw.cz>
Date:	Fri, 10 Apr 2009 00:00:43 +0200
From:	Pavel Machek <pavel@....cz>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Matthew Garrett <mjg@...hat.com>, 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: [PATCH 2/2] Make relatime default

On Thu 2009-04-09 14:20:40, Linus Torvalds wrote:
> 
> 
> On Thu, 9 Apr 2009, Pavel Machek wrote:
> > 
> > Well, stat() syscall no longer returns sane value in st_atime, while
> > all the userland stayed the same; only kernel changed. I believe that
> > is ABI change.
> 
> No. 
> 
> If you want the old abi, use "strictatime" in your /etc/fstime.
  ~~~~~~~~~~~~~~~~~~~~~~~~

So you agree it is an ABI change :-).

> No ABI changed. Just the default mount options changed to be what most 
> people (especially non-specialists) would likely want.

Maybe.

But lets see what awaits me with 2.6.30-rc1 update:

root@amd:~# mount /data -oremount,noatime
root@amd:~# mount /data -oremount,strictatime
mount: /data not mounted already, or bad option

...oh no, my mount is too old. My mount seems to be up-to-date with
debian testing. Should I have to install mount from sources just to
keep the compatible system settings?

There has to be a better way.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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