[PVE-User] [Moosefs-users] KVM on MFS

[Łukasz Mierzwa]

Dnia środa, 25 maja 2011 o 17:51:37 Giovanni Toraldo napisał(a):
> Hi Richard,
> 
> On 13/05/2011 19:26, Richard Chute wrote:
> > 5385  open("/mfs/pve/images/101/vm-101-disk-1.raw",
> > O_RDWR|O_DIRECT|O_CLOEXEC) = -1 EINVAL (Invalid argument)
> 
> I was wrong, I am using proxmox 1.7 with MooseFS. Today, after trying to
> ugrade to 1.8, I get the same error. :(
> 
> There is probably a regression (or some conflicts with MooseFS) on one
> of the latest proxmox updated packages:
> 
> [AGGIORNATO] ksm-control-daemon 1.0-4 -> 1.0-5
> [AGGIORNATO] libpve-storage-perl 1.0-16 -> 1.0-17
> [AGGIORNATO] proxmox-ve-2.6.32 1.7-30 -> 1.8-33
> [AGGIORNATO] pve-firmware 1.0-10 -> 1.0-11
> [AGGIORNATO] pve-kernel-2.6.32-4-pve 2.6.32-30 -> 2.6.32-33
> [AGGIORNATO] pve-manager 1.7-11 -> 1.8-17
> [AGGIORNATO] pve-qemu-kvm 0.13.0-3 -> 0.14.0-3
> [AGGIORNATO] qemu-server 1.1-28 -> 1.1-30
> [AGGIORNATO] vzctl 3.0.24-1pve4 -> 3.0.26-1pve4
> [AGGIORNATO] vzdump 1.2-10 -> 1.2-12
> [AGGIORNATO] vzprocps 2.0.11-1dso2 -> 2.0.11-2
> 
> The only thing I tried, it's to manually downgrade pve-qemu-kvm to 0.13,
> but nohting changed. After, I removed proxmox, modified my sources.list
> to point to pve1.7 version, and reinstall, and everything was working
> again.
> 
> I'm cc-ing to pve mailing list too.
> 
> Regards,

MFS is fuse based and fuse does not support O_DIRECT which is default since 
1.8, You need to add cache=writeback to disk defined in /etc/qemu-
server/$VID.conf
example:

virtio0: MFS_disks:101/vm-101-disk-1.raw,cache=writeback

or

ide0: MFS_disks:101/vm-101-disk-1.raw,cache=writeback

Łukasz Mierzwa