On Tue, Oct 23, 2007 at 10:48:12AM -0500, John McMonagle wrote:
> Have amd64 xen 3.1 installed on debian etch.
>
> Have all the domu file systems in lvm.
>
> Problem 1
>
> If I have a xfs files system when I mount it on domu I get this error:
> Filesystem "sda5": Disabling barriers, not supported by the underlying 
> device
> XFS mounting filesystem sda5
> Ending clean XFS mount for filesystem: sda5
>
> If I mount with nobarriers the message goes away.
> If I mount under dom0 there is no error message.
> Same if under 32 or 64 bit.
>
> My guess is it's confused by the sda5 and expect some disk drive properties 
> that do not exist.
> I'm new to xfs. Possibly this is not important??
http://oss.sgi.com/projects/xfs/faq.html#wcache_fix
It's not serious, but you can have problems on power-losses.
>
> Problem 2
>
> If I run a 32 bit domu with a 64 bit kernel quota does not work
> root@nfondy:~# quota root
> Segmentation fault
> root@nfondy:~# xfs_quota
> xfs_quota> df
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
> XFS_IOC_FSGEOMETRY_V1: Invalid argument
>
Yes, this is a bug removed in recent kernels.
> If I load the 64 bit executables and needed libraries at least it appears to 
> work properly:
> root@nfondy:~# ./quota root
> Disk quotas for user root (uid 0): none
> root@nfondy:~# ./xfs_quota
> xfs_quota> df
> Filesystem 1K-blocks Used Available Use% Pathname
> /dev/sda2 1038336 120160 918176 12% /
> /dev/sda2 1038336 120160 918176 12% /dev/.static/dev
> /dev/sda3 3135488 1022968 2112520 33% /var
> /dev/sda4 5232640 2004076 3228564 39% /usr
> /dev/sda5 1038336 18056 1020280 2% /home
> /dev/sda6 3135488 308 3135180 1% /tmp
>
> To me looks more like a mixed environment problem?
> In this case don't want to go 64 bit yet also need quota.
> Can one run a 32 bit xen kernel under 64 bit dom0?
Yes, on Xen >= 3.1.
-- 
lfr
0/0

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