Re: [win-pv-devel] Windows 10 domU is unstable with PV Bus Driver

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

> -----Original Message-----
> From: win-pv-devel [mailto:win-pv-devel-bounces@xxxxxxxxxxxxxxxxxxxx] On
> Behalf Of Michel D'HOOGE
> Sent: 07 November 2017 13:46
> To: win-pv-devel@xxxxxxxxxxxxxxxxxxxx
> Subject: [win-pv-devel] Windows 10 domU is unstable with PV Bus Driver
> 
> Hello,
> 
> This is my first post here so please forgive me if I missed something
> obvious… But I've been searching for a while :-/
> 
> So, my Windows 10 domU is stable as long as I don't install the PV drivers.
> I couldn't install version 8.2.1 of the PV drivers, so in July I tried
> the test version from http://xenbits.xen.org/pvdrivers/win/. It worked
> well for a while but last month it started to reboot from times to
> times (I'd say after a "big" Windows upgrade).
> I uninstalled all PV drivers and the OS was stable again. So yesterday
> I tried again with the latest versions of the PV driver and I managed
> to install xenbus and xenvbd before it got unstable again.
> Painfully I managed to remove everything and it's back to stable.
> 
> I can live without the PV drivers (especially given the time I've lost
> trying to use them compared to the benefit!) but it's a bit of a pity
> and I'd like to understand.
> Is there something I can try to debug that?
> 

Michael,

Sounds like it is xenvbd that's probably interacting badly with your storage 
backend. If you leave don't install xenvbd, but install the rest (xenvif, 
xennet and xeniface) do you see any instability?
What storage backend are you using? Also, can you get hold of your VM's QEMU 
log? It might have some clues. Also, I'm curious as to why version 8.2.1 was 
not working for you.

Cheers,

  Paul


> Thank you for your help
> Michel
> 
> 
> I collected some data, but this isn't meaningful to me.
> 
> Name                                        ID   Mem VCPUs      State   
> Time(s)
> win10                                        3  3800     4     ---sr-      
> 79.8
> 
> (XEN) *** Dumping Dom3 vcpu#1 state: ***
> (XEN) ----[ Xen-4.9.0  x86_64  debug=n   Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    0010:[<fffff802d49785a3>]
> (XEN) RFLAGS: 0000000000010082   CONTEXT: hvm guest (d3v1)
> (XEN) rax: ffffd30041debb10   rbx: ffffd30041de8328   rcx: 0000000000000000
> (XEN) rdx: 0000000000006380   rsi: 0000000000000007   rdi: ffffd30041de8328
> (XEN) rbp: ffffd30041debbd0   rsp: ffffd30041deb9d0   r8:  00000000000000ff
> (XEN) r9:  00000000000000de   r10: fffff802d49785a3   r11: 0000000000000000
> (XEN) r12: ffffd30041de81f0   r13: 00000000ffffff00   r14: ffffd30041de83d0
> (XEN) r15: 0000000000000000   cr0: 0000000080050031   cr4: 00000000001506f8
> (XEN) cr3: 00000000001aa000   cr2: 0000000000006380
> (XEN) ds: 002b   es: 002b   fs: 0053   gs: 002b   ss: 0018   cs: 0010
> 
> 
> Name                                        ID   Mem VCPUs      State   
> Time(s)
> win10                                        6  3800     4     ---sc-      
> 99.5
> 
> (XEN) *** Dumping Dom6 vcpu#0 state: ***
> (XEN) ----[ Xen-4.9.0  x86_64  debug=n   Not tainted ]----
> (XEN) CPU:    1
> (XEN) RIP:    0010:[<fffff800bf56574f>]
> (XEN) RFLAGS: 0000000000010086   CONTEXT: hvm guest (d6v0)
> (XEN) rax: fffff800c2860f70   rbx: 00000000c0000001   rcx: fffff80790829310
> (XEN) rdx: 000000000000004d   rsi: 0000000000000028   rdi: 0000000000000000
> (XEN) rbp: fffff800c2860e80   rsp: fffff800c2860e60   r8:  0000000000000000
> (XEN) r9:  fffff80790829000   r10: 0000000000000027   r11: fffff800c2860f58
> (XEN) r12: 000000000000003d   r13: fffff800c2863301   r14: 0000000000000028
> (XEN) r15: fffff80790813f80   cr0: 0000000080050031   cr4: 00000000001506f8
> (XEN) cr3: 0000000000212000   cr2: fffff800c284a080
> (XEN) ds: 002b   es: 002b   fs: 0053   gs: 002b   ss: 0018   cs: 0010
> 
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