Description of problem: On rhel5.3 Dom0 install rhel4.6 DomU FV guest,then install kmod-xenpv. then run virsh save domU file The process virsh save can't pause unless using Ctrl+C Version-Release number of selected component (if applicable): kmod-xenpv-0.1-10.el4.rpm module-init-tools-3.1-0.pre5.3.4.el4_6.1 modversions-1.0-4.el4_6.1 How reproducible: always Steps to Reproduce: 1.On rhel 5.3 Dom0 install rhel 4.6 domU FV guest,then install kmod-xenpv according to the documentation 2.Open a terminal then run lsmod |grep xen, verify the xen_vbd,xen_vnif,xen_balloon,xen_platform_pci are loaded OK 3.In dom0 run virsh save domU filename to save the domU Actual results: The virsh save process works all the time,but you will see the file size doesn't change,it is 952. In domU terminal,input something, it doesn't work though the cursor is blinking all the time Kill the virsh save process, then run virsh save domU another file name It will output libvir:error:invalid argument in _virGetDomain error:failed to get domain 'domU' Expected results: It can run virsh save domU filename well Additional info: Before I install xenpv then run virsh save domU filename,it can work well i386,x86_64 all have the same problem
Can you try this same test with RHEL 4.8, which has the PV-on-HVM drivers included? Unfortunately there was a bug prior to 4.8 which would cause hangs in the guest during save, and would cause something similar to this. If you can't reproduce on 4.8, then we'll just close this as CURRENTRELEASE. Chris Lalancette
I have tried on rhel 4.8,on rhel 4.8,I can't install xenpv well.Please refer to bug 512326, So I have to try it on rhel 4.6
(In reply to comment #2) > I have tried on rhel 4.8,on rhel 4.8,I can't install xenpv well.Please refer to > bug 512326, > > So I have to try it on rhel 4.6 As I said in Comment #1 and BZ 512326 which I just closed, that's expected. The PV-on-HVM drivers are built in to the 4.8 kernel, so no xenpv-kmod package is required. Just modprobe xen-vnif and modprobe xen-vbd should work find after a 4.8 guest installation. Then try your test again. Chris Lalancette
I have retested again on 4.8 kernel according to your suggestion. modprobe xen-vnif, modprobe xen-vbd then run virsh save domU filename virsh restore filename After the domU is restored, the screen is freezing,it has no response.
OK, that's the information we're looking for, thanks. Andrew, any chance you can take a look at this, try to recreate, and see what's going on? Chris Lalancette
I started looking at this today. I don't get a frozen screen, but my domU resets. I tried both modules separately and found that the save/restore works fine when only xen-vnif is loaded. xm dmesg shows some mfn errors after the failure. I'll continue looking at this Tuesday, since I have PTO Monday. Andrew
This is a dup of 396631 which is a clone of 396621. The problem goes away using the 4.8 kernel, but modprobing in patched modules. Closing as a dup. *** This bug has been marked as a duplicate of bug 396631 ***
Clearing out flags for reporting purposes. Chris Lalancette