[Xen-users] Ext4 error on DomU

["Olivier B." <xen.list@xxxxxxxxx>]

Hello,

I suppose it's a Xen problem, but it can be an Ext4 problem : just after 
mounting an ext4 partition, I tried to move (mv) a rsnapshot dir from an 
ext3 (xvda2) partition to the ext4 (xvda3) one.
Some symbolic links was moved, then there is this error :
   Feb 24 13:30:40 sofia kernel: EXT4-fs: mounted filesystem with 
ordered data mode.
   Feb 24 13:31:35 sofia kernel: blkfront: xvda3: write barrier op failed
   Feb 24 13:31:35 sofia kernel: blkfront: xvda3: barriers disabled
   Feb 24 13:31:35 sofia kernel: end_request: I/O error, dev xvda3, 
sector 50593912
   Feb 24 13:31:35 sofia kernel: end_request: I/O error, dev xvda3, 
sector 50593912
   Feb 24 13:31:35 sofia kernel: Aborting journal on device xvda3:8.
   Feb 24 13:31:35 sofia kernel: ext4_abort called.
   Feb 24 13:31:35 sofia kernel: EXT4-fs error (device xvda3): 
ext4_journal_start_sb: Detected aborted journal
   Feb 24 13:31:35 sofia kernel: Remounting filesystem read-only

But I don't see anything in Xen logs.
Does someone know what is the cause ?

Thanks,
Olivier
PS : I use a 2.6.28.6 kernel, Dom0 and DomU are Debian Lenny 64bit, and 
VT is enabled.
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