On Wed, Feb 27, 2013 at 10:07:15AM -0500, Mike Snitzer wrote: > On Tue, Feb 26 2013 at 8:49pm -0500, > Dave Chinner <david@xxxxxxxxxxxxx> wrote: > > > 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 https://www.redhat.com/archives/dm-devel/2013-February/msg00086.html > > > (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: there > > > was a userspace bug for a short period some time ago when discards were enabled. > > > > 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 > > Was issue_discards enabled in lvm.conf? $ grep issue_discards /etc/lvm/lvm.conf issue_discards = 0 $ Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
