linux-kernel - Re: [PATCH 3/3] Add timeout feature

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Message-Id: <E1KGUlR-0006zH-FT@pomaz-ex.szeredi.hu>
Date:	Wed, 09 Jul 2008 10:11:01 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	david@...morbit.com
CC:	miklos@...redi.hu, arjan@...radead.org, hch@...radead.org,
	tytso@....edu, pavel@...e.cz, t-sato@...jp.nec.com,
	akpm@...ux-foundation.org, viro@...IV.linux.org.uk,
	linux-ext4@...r.kernel.org, xfs@....sgi.com, dm-devel@...hat.com,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	axboe@...nel.dk, mtk.manpages@...glemail.com
Subject: Re: [PATCH 3/3] Add timeout feature

On Wed, 9 Jul 2008, Dave Chinner wrote:
> On Wed, Jul 09, 2008 at 09:13:34AM +0200, Miklos Szeredi wrote:
> > On Wed, 9 Jul 2008, Dave Chinner wrote:
> > > The argument against Miklos' version is that there may be multiple
> > > commands to execute while the fs is frozen.
> > 
> > Which is what a shell is for ;)
> 
> Yeah, weĺl, with your method I ca't tell a user to:
> 
> 	# xfs_freeze -f /mntpt
> 	# xfs_db -r -c 'sb 0' -c 'p rootino' /dev/foo
> 	128
> 	# xfs_db -r -c 'ino 128' -c 'p core.format' /dev/foo
> 	core.format = 2 (extents)
> 	# xfs_db .....
> 	.....
> 	# xfs_freeze -u /mntpt
> 
> i.e. using the freeze to force all metadata to disk and
> prevent it from changing while doing interactive debugging
> of some problem.

	# run_freeze /mntpt /bin/bash
	# ...
	# ^D

It's the same, no?

Miklos
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