Re: [Xen-users] Ext4 error on DomU [resolved]

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

So I answer, with the last kernel (2.6.28.7) there is no more the problem :

   Feb 24 14:20:20 sofia kernel: EXT4-fs: mounted filesystem with 
ordered data mode.
   Feb 24 14:20:41 sofia kernel: JBD: barrier-based sync failed on 
xvda3:8 - disabling barriers
It works very well :)

Olivier

Olivier B. a écrit :
> Well, in the 2.6.28.7 changelog I found that :
>
>    Xen doesn't report that barriers are not supported until buffer I/O is
>    reported as completed, instead of when the buffer I/O is submitted.
>    Add a check and a fallback codepath to journal_wait_on_commit_record()
>    to detect this case, so that attempts to mount ext4 filesystems on
>    LVM/devicemapper devices on Xen guests don't blow up with an "Aborting
>    journal on device XXX"; "Remounting filesystem read-only" error.
>
> As there is a lot of Ext4 fixes too, I will upgrade my kernel before 
> continue.
> Olivier
>
>
> Olivier B. a écrit :
> > 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.
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
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