On Wed, Feb 27, 2013 at 01:04:14AM +0000, Alasdair G Kergon wrote:
> (Quick pointers that might be relevant)
> EAGAIN, I'm not aware of dm itself returning that on the i/o path.
Neither am I, but it's coming from somewhere in the IO path...
> For 3.8 issues, read dm-devel around
> (I queued the dm-side fixes for linux-next earlier today)
It's reproducable on lots of different kernels, apparently - 3.8,
3.4.33, CentOS 6.3, debian sid/wheezy and Fedora 18 were mentioned
specifically by the OP - so it doesn't look like a recent
regression or constrained to a specific kernel.
> For pvmove, check exactly which version and whether discards are enabled:
> was a userspace bug for a short period some time ago when discards were
The version I used to reproduce on a 3.8.0 kernel was:
$ pvmove --version
LVM version: 2.02.95(2) (2012-03-06)
Library version: 1.02.74 (2012-03-06)
Driver version: 4.23.1
>From Debian unstable.