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Re: [Xen-users] Live checkpointing not working in 3.4.x?

Normal 'xm save' and 'xm restore' works just fine.  My PV guest kernel is:

[root@ovm-pv-01 ~]# uname -a
Linux ovm-pv-01.example.com 2.6.18-164.el5xen #1 SMP Thu Sep 3 04:41:04 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux


Pasi Kärkkäinen wrote:
On Thu, Mar 04, 2010 at 12:12:56AM -0600, Tom Verbiscer wrote:
I've been banging my head against a wall for a couple days now. Does anyone know if live checkpointing ('xm save -c') is currently working in 3.4.x? I've now tried with 3.4.0 on OracleVM, 3.4.1 on CentOS 5.4 and 3.4.2 on OpenSolaris. Each platform gives me the same results. It seems like the suspend works but does not release the devices so when the resume runs, it freaks because the devices are already attached. I don't know enough about Xen to know if the devices are supposed to remain attached (because it doesn't destroy the domain) or not. Every time I try to live checkpoint the VM winds up suspended and the only way to bring it back to life is to run 'xm destroy' on it and then 'xm resume'. I'll be happy to provide more logs if I've leaving something out. The following is on a OracleVM hypervisor (yes, OracleVM doesn't support checkpointing but the results are the same with vanilla Xen). Also doesn't matter if I use a file backend device for the disk or a physical device or a file on an NFS share, same result.

does normal "xm save" and then "xm restore" work for you? What's the guest kernel version? save/restore heavily depends on the guest kernel version/features (for pv guests).

-- Pasi


[root@compute-01 ~]# rpm -qa | grep xen
[root@compute-01 ~]# uname -a
Linux compute-01.example.com 2.6.18- #1 SMP Fri Oct 9 14:57:31 EDT 2009 i686 i686 i386 GNU/Linux

[root@compute-01 ~]# cat /OVS/running_pool/1_ovm_pv_01_example_com/vm.cfg
bootargs = 'bridge=xenbr0,mac=00:16:3E:AA:EB:08,type=netfront'
bootloader = '/usr/bin/pypxeboot'
disk = ['file:/tmp/System.img,xvda,w']
maxmem = 512
memory = 512
name = '1_ovm_pv_01_example_com'
on_crash = 'restart'
on_reboot = 'restart'
uuid = '7408c627-3232-4c1d-b5e3-1cf05cb015c8'
vcpus = 1
vfb = ['type=vnc,vncunused=1,vnclisten=,vncpasswd=<removed>']
vif = ['bridge=xenbr0,mac=00:16:3E:AA:EB:08,type=netfront']
vif_other_config = []

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