On Wed, Mar 23, 2016 at 04:32:21PM +0100, Carlos Maiolino wrote:
> I'm still trying to get a reliable reproducer, at least exactly with what I
> have
> seen a few days ago.
>
> Shyam, could you try to reproduce it with a recent/upstream kernel? That would
> be great to make sure we have been seen the same issue.
>
> AFAICT, it happens in the following situation:
>
> 1 - Something is written to the filesystem
> 2 - log checkpoint is done for the previous write
> 3 - Disk failure
> 4 - XFS tries to writeback metadata logged in [2]
>
> When [4] happens, I can't trigger xfs_log_force messages all the time, most of
> time I just get an infinite loop in these messages:
>
> [12694.318109] XFS (dm-0): Failing async write on buffer block
> 0xffffffffffffffff. Retrying async write.
>
> Sometimes I can trigger the xfs_log_force() loop.
This all smells like the filesystem is getting IO errors but it not
in a shutdown state. What happens when you run 'xfs_io -x -c
"shutdown" /mnt/pt' on a filesystem in this state? Can you then
unmount it?
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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