Re: [Xen-users] HVM with stub domains fails at startup: ERROR Internal error: Could not open grant table interface (22 = Invalid argument)

["John" <lists.xen@xxxxxxxxxxxxxxxxxx>]

Martin,

> 1. start fs-backend in the background (as user root)
> /usr/sbin/fs-backend
> 2. start VM with xm create -c hvm_stub.conf
> 3. error logs on command line, both DomUs are listed by xm, but stay with 
> 0 CPU time
I have seen a similar problem here, running the latest pv_ops and 
xen-unstable. In my case, I am trying to run Windows Server x64 HVM and 
stubdom messages print to /var/log/xen/qemu-dm-testvds-dm.log:
domid: 101
Warning: vlan 0 is not connected to host network
Watching /local/domain/0/device-model/101/logdirty/cmd
Watching /local/domain/0/device-model/101/command
char device redirected to /dev/pts/10
char device redirected to /dev/pts/11
/usr/src/xen-unstable.hg/tools/ioemu-dir/hw/xen_blktap.c:628: Init blktap 
pipes
ERROR Internal error: Could not open grant table interface (22 = Invalid 
argument)
xen be core: xen be core: can't open gnttab device
can't open gnttab device
ERROR Internal error: Could not open grant table interface (22 = Invalid 
argument)
xen be core: xen be core: can't open gnttab device
can't open gnttab device
Log-dirty: no command yet.

Maybe we're doing the same thing wrong here?

Have you tried with a LVM or file: backing store? Do normal HVM and PV 
domains work properly for you?
-John 

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