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Re: [PATCH 3/3] Add timeout feature

To: david@xxxxxxxxxxxxx
Subject: Re: [PATCH 3/3] Add timeout feature
From: Miklos Szeredi <miklos@xxxxxxxxxx>
Date: Wed, 09 Jul 2008 10:11:01 +0200
Cc: miklos@xxxxxxxxxx, arjan@xxxxxxxxxxxxx, hch@xxxxxxxxxxxxx, tytso@xxxxxxx, pavel@xxxxxxx, t-sato@xxxxxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, viro@xxxxxxxxxxxxxxxxxx, linux-ext4@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, dm-devel@xxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, axboe@xxxxxxxxx, mtk.manpages@xxxxxxxxxxxxxx
In-reply-to: <20080709073358.GT11558@disturbed> (message from Dave Chinner on Wed, 9 Jul 2008 17:33:58 +1000)
References: <20080708231026.GP11558@disturbed> <20080708232031.GE18195@xxxxxxxxxx> <20080709005254.GQ11558@disturbed> <20080709010922.GE9957@xxxxxxx> <E1KGSvZ-0006dB-53@xxxxxxxxxxxxxxxxxxx> <20080709061621.GA5260@xxxxxxxxxxxxx> <E1KGT4q-0006fD-Jb@xxxxxxxxxxxxxxxxxxx> <20080708234120.5072111f@xxxxxxxxxxxxx> <20080709065950.GR11558@disturbed> <E1KGTrq-0006qj-1u@xxxxxxxxxxxxxxxxxxx> <20080709073358.GT11558@disturbed>
Sender: xfs-bounce@xxxxxxxxxxx
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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