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Re: [dm-devel] [BUG] pvmove corrupting XFS filesystems (was Re: [BUG] In

To: Dave Chinner <david@xxxxxxxxxxxxx>, Matteo Frigo <athena@xxxxxxxx>, dm-devel@xxxxxxxxxx, xfs@xxxxxxxxxxx
Subject: Re: [dm-devel] [BUG] pvmove corrupting XFS filesystems (was Re: [BUG] Internal error xfs_dir2_data_reada_verify)
From: Alasdair G Kergon <agk@xxxxxxxxxx>
Date: Wed, 27 Feb 2013 01:04:14 +0000
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20130226044039.GM5551@dastard>
Mail-followup-to: Dave Chinner <david@xxxxxxxxxxxxx>, Matteo Frigo <athena@xxxxxxxx>, dm-devel@xxxxxxxxxx, xfs@xxxxxxxxxxx
Organization: Red Hat UK Ltd. Registered in England and Wales, number 03798903. Registered Office: Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE.
References: <87d2vnc34r.fsf@xxxxxxxx> <20130226044039.GM5551@dastard>
User-agent: Mutt/1.4.1i
(Quick pointers that might be relevant)

EAGAIN, I'm not aware of dm itself returning that on the i/o path.

For 3.8 issues, read dm-devel around 
https://www.redhat.com/archives/dm-devel/2013-February/msg00086.html
(I queued the dm-side fixes for linux-next earlier today)

For pvmove, check exactly which version and whether discards are enabled: there
was a userspace bug for a short period some time ago when discards were enabled.

Alasdair

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