Re: [Xen-devel] Dear, Mr.Stabellini. I have a question about xen PVHVM guest.

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

CC'ing xen-devel

On Sat, 29 Jun 2013, Stefano Stabellini wrote:
> Dear, Sir.
> My name is Younghyun Jo.
> And I am a master student at Seoul National University, Korea.
> And I also study on Virtualization and VM checkpointing.
> 
> I have a problem with PVHVM guest.
> I installed xen-4.1.2 on my server. And I run a PVHVM guest on my LVM.
> The PVHVM guest is ubuntu-12.04.2-desktop.
> 
> When I save a machine, It acts fine.
> But, When I restore that machine, It seems more slow. (I think this is may be 
> cache problem)
> Serious thing is that the guest finally die after a while. (I couldn't find 
> the answer)
> 
> I do not know the reason why my guest die.
> (Actually, ubuntu-12.04.2-server will not die, it happens only for 
> 12.04.2-desktop guest)
> 
> Is it a known bug?

No, it is not.


> Or, is it a Xen version problem?

Xen 4.1 is old now, we are working on Xen 4.3, that is about to be
released. It might be worth trying to reproduce the bug on a newer Xen
version.


> I know you are a busy man. And my question seems to be interrupt for your 
> work.
> But, Nobody can be helpful for me in Korea community and Google.
> Any suggestions are greatly appreciated.

You could try to gather as many logs as possible from Xen and Linux.
For Linux add

earlyprintk=xenboot loglevel=9 debug

to the kernel command line.
For Xen add

guest_loglvl=all

to the Xen command line.

Please post the Xen serial output and the Linux kernel output of your
DomU.


> Thank you for reading.
> 
> Best Regards,
> Younghyun Jo.
> 
> 
> 
> Here is my guest configurationÂ
> ----------------------------------------------------------------------------
> kernel = "hvmloader"
> 
> builder='hvm'
> 
> vcpus = 4Â
> memory = 4096
> 
> name = "pvhvm-ubuntu"
> 
> disk = ['phy:/dev/vg/myvmdisk1,hda,w',
> Â Â Â Â Â Â
> 'file:/home/younghyun/domains/ubuntu-12.04.2-desktop-amd64.iso,hdc:cdrom,r']
> 
> device_model = 'qemu-dm'
> boot="cd"
> sdl=0
> opengl=1
> vnc=1
> vnclisten="0.0.0.0"
> vncdisplay=1
> vncpasswd=''
> stdvga=0
> serial='pty'
> tsc_mode=0
> usb=1
> usbdevice='tablet'
> xen_platform_pci=1
> ----------------------------------------------------------------------------
> 
> 
>

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