Re: [Xen-users] growing file systems

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

The problem might be that the change in size of the underlying block device 
isn't passed through to the guest.  If that's the problem I'd imagine this 
ought to be fixable reasonably easily (by someone with the appropriate kernel 
experience / motivation)

Cheers,
mark

On Thursday 29 June 2006 16:20, Brock Palen wrote:
> sfdisk --re-read /dev/hdb
>
> gave me this:
> sfdisk: cannot open /dev/hdb for reading
>
> I was forced to reboot the domU and rerun xfs_growfs and it worked
> fine.  Though this is much less than optimal. and half the reason i
> use xfs :(
>
> anyone else know of a reliable live filesystem grower ?
>
> Brock Palen
> Center for Advanced Computing
> brockp@xxxxxxxxx
> (734)936-1985
>
> On Jun 29, 2006, at 11:01 AM, Jan Philipp Giel wrote:
> > Am Donnerstag 29 Juni 2006 16:34 schrieb Brock Palen:
> >> Has anyone seen a problem with growing file systems in domU's with
> >> xfs?  I use LVM for my volumes.  i grew the volume in dom0 with
> >> 'lvextend -L +10G /dev/noraid/bacdumps'
> >>
> >> in the domU i run  'xfs_growfs /path/to/mounted/fs'
> >>
> >> lvs in dom0 says the volume is larger.
> >> bacdumps    noraid -wi-ao  25.00G
> >>
> >> but xfs_growfs prints out info of the old size (15 GB)
> >>
> >> bsize=4096   blocks=3932160
> >>
> >> and 'df' in the domU shows the same results only 15GB,   i dont have
> >> this problem on non xen machines.  Any thoughts ?
> >
> > Could it be that your domU kernel has to re-read the partition
> > table? Maybe
> > the domU kernel does not know that you have resized the "partition"
> > but the
> > dom0 kernel does (because you used lvextend in there).
> >
> > sfdisk --re-read
> >
> > should make your kernel reread the partition table (if you have
> > sfdisk...).
> >
> > Regards
> > Philipp
> >
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-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
Dave: Skateboards have wheels.
Mark: My wheel has a wheel!

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