KVM guest I/O errors with xfs backed gluster volumes

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> What kind of a volume are you using?

Replicated.  However, I'm only using 1 gluster host with 1 brick.
I've tried a few other replicated scenarios (2 hosts, 2x replication)
and I'm able to reproduce the observed behavior.

> Do you observe any failures in the gluster client log files?

Using 3.4.0alpha3 I get a mix of the following errors:

[2013-04-29 12:17:06.345816] W
[client-rpc-fops.c:2697:client3_3_readv_cbk] 0-xfs-client-0: remote
operation failed: Invalid argument
[2013-04-29 12:17:06.345858] W [fuse-bridge.c:2049:fuse_readv_cbk]
0-glusterfs-fuse: 17200: READ => -1 (Invalid argument)

[2013-04-29 12:17:10.673133] W
[client-rpc-fops.c:873:client3_3_writev_cbk] 0-xfs-client-0: remote
operation failed: Invalid argument
[2013-04-29 12:17:10.673178] W [fuse-bridge.c:2127:fuse_writev_cbk]
0-glusterfs-fuse: 17450: WRITE => -1 (Invalid argument)

To reproduce, I performed the following steps:

1) Defined/mounted (xfs backed) gluster volume from virt-manager on KVM host
2) Added a new VirtIO disk from virt-manager (1GB, raw, cachemode=none)
3) Partitioned disk on KVM guest
4) Created ext4 filesystem on new VirtIO disk on KVM guest)
5) Attempted to mount new ext4 filesystem

I've attached the full gluster client log for reference.

-Jacob
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