> 
> > Hmm.
> >
> > If it's related to lvm snapshots, there's a workaround I just added to
> > the
> > bcache-3.2 branch - I'd give that a try, looks plausible from your log.
> >
> 
> Is that the default writeback_percent = 10 in commit
> 113740372e2244951fb34235b30a2ac646a5d8c2?
> 
> Can I effect the same change by "echo 10 >writeback_percent"? If so then it
> would save the hassle of a rebuild just to test. I assume it's sleep time in 
> your
> timezone at the moment so I'll test it anyway and let you know - it was 
> failing
> pretty consistently, within 30 seconds of starting my restore job.
> 

Setting writeback_percent=10 manually resulted in no change - crash still 
occurred within a few minutes of the restore job starting.

Deleting the snapshot and running on the original LV resulted in no problems, 
so it's definitely snapshot related.

James
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