On Sun, 2011-12-11 at 22:02 +0000, Dominic Hargreaves wrote: > retitle 637234 linux-image-3.0.0-1-686-pae: I/O errors using ext4 under xen (also affects ext3 as of linux-image-3.1.0-1-amd64 et al) > thanks > > [note that I've stripped off the CC to xen-devel in this comment, but > have no objection to it being put back if it makes sense] > > On Wed, Sep 07, 2011 at 08:29:38AM -0400, Konrad Rzeszutek Wilk wrote: > > On Wed, Sep 07, 2011 at 02:51:04AM +0100, Ben Hutchings wrote: > > > On Mon, 2011-08-29 at 10:08 -0400, Konrad Rzeszutek Wilk wrote: > > > [...] > > > > Oh, I think I know _exactly_ what bug that is: > > > > > > > > This git commit: > > > > 280802657fb95c52bb5a35d43fea60351883b2af "xen/blkback: When writting barriers set the sector number to zero" > > > > has to be reverted. Specifically: > > > > > > > > commit 3f963cae3ef35d26fdd899c08797a598c5ca3e9b > > > > Author: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> > > > > Date: Tue Jul 19 16:44:42 2011 -0700 > > > > > > > > Revert "xen/blkback: When writting barriers set the sector number to zero..." > > > [...] > > > > and this one added: > > > > > > > > 25266338a41470a21e9b3974445be09e0640dda7 > > > > xen/blkback: don't fail empty barrier requests > > > [...] > > > > > > Which repository are these in? > > > > Jeremy's: git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git > > This problem is also present with ext3 by default now, following the > barriers-by-default change in Linux 3.1 (I'm seeing the problems with > 3.1.4-1 domU and squeeze dom0; the barrier=0 workaround works). > > If I'm not confused, this message from Konrad is about the same problem, > and points to another possible fix: > > <http://lists.xen.org/archives/html/xen-devel/2011-12/msg00306.html> That fix looks plausible and is in any case correct in its own right so I have added it to SVN for 2.6.32-40. Ian. > > I suspect that over time this will hit a lot of people on domU upgrades > from squeeze to wheezy - and it needs to be fixed in the dom0 kernel, which > presumably means a point release update. > > Cheers, > Dominic. > > -- > Dominic Hargreaves | http://www.larted.org.uk/~dom/ > PGP key 5178E2A5 from the.earth.li (keyserver,web,email) > > > -- Ian Campbell Will it improve my CASH FLOW?
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