Bug on barriers for virtio_blk device - end_request: I/O error, devvda, sector 0

[Massimo Cetra]

Hello all,

i ended up with some thiusands of errors after upgrading to 2.6.31.2 
like this one:

end_request: I/O error, dev vda, sector 0
end_request: I/O error, dev vda, sector 0
end_request: I/O error, dev vda, sector 0
end_request: I/O error, dev vda, sector 0

I am using ocfs2 on top of drbd on top of LVM in a KVM guest that uses 
virtio_blk.

The bug is already known, see here:
https://bugzilla.redhat.com/show_bug.cgi?id=514901

A patch exists and the problem has already been submitted here in the list.
See here: http://lkml.org/lkml/2009/8/6/153

That fix is not in 2.6.31 nor in 2.6.32-RCX

Could you please consider pulling it and adding this fix for inclusion 
in 2.6.31.$next and also to mainline?

Thanks.

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