Re: Massive ext4 filesystem corruption after a failed s2disk/ram cycle

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On Wed, Oct 07, 2009 at 01:14:10PM +1100, Daniel Pittman wrote:
> For what it is worth, I would also be quite interested to know /why/ XFS is
> bad in this regard.  Is it just the previously stated "XFS writes to disk
> despite freezing kernel threads" issue, or something deeper?

sync pushes out all data to disk, but in a journaling filesystem that
might just but the log not the "normal" place on disk.  For a boot
loader to deal with it properly it actually needs to do an replay of
the log.  Grub does so for reiserfs but not for XFS for some reason.
I don't know why problems don't trigger more often with ext3, though.
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