Re: Windows 7 VM BSOD

[Vadim Rozenfeld <vrozenfe@redhat.com>]

On Thu, 2014-12-04 at 10:48 +0800, Thomas Lau wrote:
> what does vapic affect Windows 7 at all if I disable it? if it just a
> minor performance drop, I am fine with that.
> 

It's good to have it turned on. But you definitely can drop it off.
 
> On Thu, Dec 4, 2014 at 10:06 AM, Zhang Haoyu <zhanghy@sangfor.com> wrote:
> >>Sure, but I am little confused as KVM is part of linux kernel now, if
> >>I want to try it, should I just upgrade kernel or compile kvm kernel
> >>module by myself ?!
> >>
> > You can just apply the patch to kvm module and rebuild it.
> >
> >>On Thu, Dec 4, 2014 at 10:01 AM, Zhang Haoyu <zhanghy@sangfor.com> wrote:
> >>>>I just confirmed that vapic is causing win7 stuck.
> >>>>
> >>> You'd better try the commit fc57ac2c9ca :-)
> >>>
> >>>>On Thu, Dec 4, 2014 at 9:34 AM, Thomas Lau <tlau@tetrioncapital.com> wrote:
> >>>>> Hi,
> >>>>>
> >>>>> I don't want to recompile stuff, does it matter to have hv_vapic on at all?
> >>>>>
> >>>>> On Thu, Dec 4, 2014 at 9:24 AM, Zhang Haoyu <zhanghy@sangfor.com> wrote:
> >>>>>>> Oh I see,
> >>>>>>>
> >>>>>>> So 101 BSOD problem is well known? Can't find any document mention about 101 BSOD online.
> >>>>>>>
> >>>>>>> I tried to use hv_ other options but Win7 can't boot up properly and stucked at starting Windows screen.
> >>>>>>>
> >>>>>> Could you confirm that the stuck was caused by vhich hv feature?
> >>>>>> The commit fc57ac2c9ca can resolve a stuck caused by hv_vapic which I encountered before.
> >>>>>> https://git.kernel.org/cgit/virt/kvm/kvm.git/commit/arch/x86/kvm/lapic.c?id=fc57ac2c9ca8109ea97fcc594f4be436944230cc
> >>>>>>
> >>>>>>> Sent from my BlackBerry 10 smartphone.
> >>>>>>>   Original Message
> >>>>>>> From: Vadim Rozenfeld
> >>>>>>> Sent: Wednesday, 3 December, 2014 7:30 PM
> >>>>>>> To: Thomas Lau
> >>>>>>> Cc: Zhang Haoyu; kvm; imammedo
> >>>>>>> Subject: Re: Windows 7 VM BSOD
> >>>>>>>
> >>>>>>> If you run WS2008(R2) or Win7 - always turn on relaxed timing. Otherwise
> >>>>>>> it's just a matter of time when you hit 101 BOSD.
> >>>>>>> Bugcheck 78 is quite rare one. What is your setup, and how easy it's
> >>>>>>> reproducible?
> >>>>>>>
> >>>>>>> Best regards,
> >>>>>>> Vadim.
> >>>>>>>
> >>>>>>> On Wed, 2014-12-03 at 19:13 +0800, Thomas Lau wrote:
> >>>>>>> > "it works on your side" meaning that you had such issue but afterwards
> >>>>>>> > it's all fixed by apply hv_relaxed ?
> >>>>>>> >
> >>>>>>> > On Wed, Dec 3, 2014 at 7:08 PM, Zhang Haoyu <zhanghy@sangfor.com> wrote:
> >>>>>>> > >> https://bugzilla.redhat.com/show_bug.cgi?id=893857
> >>>>>>> > >>
> >>>>>>> > >> In fact I am doing testing now, but are we fixing one problem and
> >>>>>>> > >> introduce other problem?!
> >>>>>>> > >>
> >>>>>>> > > I'm not sure about this, but it works on my side,
> >>>>>>> > > I think BSOD(error:0x00000078) has been fixed,
> >>>>>>> > > please show your environment.
> >>>>>>> > >
> >>>>>>> > > Thanks,
> >>>>>>> > > Zhang Haoyu
> >>>>>>> > >> On Wed, Dec 3, 2014 at 6:36 PM, Thomas Lau <tlau@tetrioncapital.com> wrote:
> >>>>>>> > >> > Hi,
> >>>>>>> > >> >
> >>>>>>> > >> > How do I know if my qemu-kvm version support this?
> >>>>>>> > >> >
> >>>>>>> > >> > On Wed, Dec 3, 2014 at 6:25 PM, Zhang Haoyu <zhanghy@sangfor.com> wrote:
> >>>>>>> > >> >>> Hi All,
> >>>>>>> > >> >>>
> >>>>>>> > >> >>> I am running 3.13.0-24-generic kernel on Ubuntu 14, Windows 7 VM
> >>>>>>> > >> >>> installation was fine, but it does random reboot by itself, the error
> >>>>>>> > >> >>> code is 0x00000101, does anyone know how to fix this?
> >>>>>>> > >> >> Could you try hv_relaxed, like "-cpu kvm64,hv_relaxed".
> >>>>>>> > >> >>
> >>>>>>> > >> >> Thanks,
> >>>>>>> > >> >> Zhang Haoyu
> >>>>>
> >>>>>
> >>>>>
> >>>>> --
> >>>>> Thomas Lau
> >>>>> Director of Infrastructure
> >>>>> Tetrion Capital Limited
> >>>>>
> >>>>> Direct: +852-3976-8903
> >>>>> Mobile: +852-9323-9670
> >>>>> Address: 20/F, IFC 1, Central district, Hong Kong
> >
> 
> 
>