On Tue, Dec 10, 2013 at 03:21:59PM +0100, Marko Weber | ZBF wrote:

Hello Daniel,

Am 2013-12-10 11:23, schrieb Daniel P. Berrange:

...

On Tue, Dec 10, 2013 at 11:20:35AM +0100, Marko Weber | ZBF wrote:

...

hello mailinglist,

on gentoo system with qemu-1.6.1, libvirt 1.1.4, libvirt-glib-0.1.7, virt-manager 0.10.0-r1

when i set on virtual machine "cache=none" in the disk-menu, the machine faults to start with:

<< Fehler beim Starten der Domain: Interner Fehler: Prozess während der Verbindungsaufnahme zum Monitor beendet :qemu-system-x86_64: -drive file=/raid6/virtual/debian-kaspersky.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,aio=native: could not open disk image /raid6/virtual/debian-kaspersky.img: Invalid argument

Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/asyncjob.py", line 100, in cb_wrapper callback(asyncjob, *args, **kwargs) File "/usr/share/virt-manager/virtManager/asyncjob.py", line 122, in tmpcb callback(*args, **kwargs) File "/usr/share/virt-manager/virtManager/domain.py", line 1210, in startup self._backend.create() File "/usr/lib64/python2.7/site-packages/libvirt.py", line 708, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self) libvirtError: Interner Fehler: Prozess während der Verbindungsaufnahme zum Monitor beendet :qemu-system-x86_64: -drive file=/raid6/virtual/debian-kaspersky.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none,aio=native: could not open disk image /raid6/virtual/debian-kaspersky.img: Invalid argument

...

...

when i switch back to cache=default, the machine start like a charm.

any ideas why? i cant find anything in logs, only this "invalid argument".

cache=none uses O_DIRECT flag. if you get "Invalid argument" it usually means that your filesystem is bad and does not support O_DIRECT

i use vanilla-kernel 3.10.23 and xfs on the partition where the vm .img is lying.

the mount options i use: /raid6 type xfs (rw,noatime,nodiratime,largeio,nobarrier,logbsize=256k)

any wrong here?

XFS should support O_DIRECT, but possibly one of the mount option is causing trouble. I don't know enough about XFS to answer for sure. BTW, please keep your replies on the mailing list... Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|