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Re: WAPBL and backwards compatibility
On Fri, Aug 01, 2008 at 05:22:09PM +1000, Simon Burge wrote:
> - WAPBL has relaxed ordering constraints, since it knows it can replay
> the journal if there is a crash. I'm not sure if in practice this
> can cause the filesystem to get into a state where a non-WAPBL-aware
> fsck_ffs can get too confused, and am also not too sure how to verify
> if this is really an issue.
It is quite likely that such states exist. There are definitely states
that will cause fsck -p to fail.
In general it'll be like trying to fsck after crashing with -o async,
that is, sometimes it will work but more often fsck will get
David A. Holland
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