By the way, after I installed new version of kernel which have vapic patch on, Win7 is running properly now. Thanks. On Thu, Dec 4, 2014 at 4:37 PM, Thomas Lau <tlau@xxxxxxxxxxxxxxxxxx> wrote: > since they change the logic inside a function and never change > function name, it's hard to tell by using nm kvm.ko as it only shows > what function name included on kernel module. > > On Thu, Dec 4, 2014 at 3:15 PM, Zhang Haoyu <zhanghy@xxxxxxxxxxx> wrote: >>>Is this the correct function? >>>kvm_lapic_set_eoi >>> >> No, see the detail of commit fc57ac2c9ca, >> https://git.kernel.org/cgit/virt/kvm/kvm.git/commit/arch/x86/kvm/lapic.c?id=fc57ac2c9ca8109ea97fcc594f4be436944230cc >> >>>I found that one tho. >>> >>>On Thu, Dec 4, 2014 at 2:22 PM, Thomas Lau <tlau@xxxxxxxxxxxxxxxxxx> wrote: >>>> I see, so it's minor performance gain, and not stability related >>>> option which is good. >>>> >>>> I am checking http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13.11.5-trusty/, >>>> changelog showing lsr function is included, but when I download and >>>> extract kvm.ko out then run nm kvm.ko | grep lsr, nothing found. >>>> >>>> On Thu, Dec 4, 2014 at 12:32 PM, Zhang Haoyu <zhanghy@xxxxxxxxxxx> 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. >>>>>> >>>>> hv_vapic provides accelerated MSR access to high usage memory mapped APIC >>>>> registers, EOI, ICR, TPR. >>>>> You can gain performance promotion from it, not too much, >>>>> but it also depends on the frequency of access to above three apic regs. >>>>> >>>>>>On Thu, Dec 4, 2014 at 10:06 AM, Zhang Haoyu <zhanghy@xxxxxxxxxxx> 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@xxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxx> 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@xxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxx> 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 >>>>> >>>> >>>> >>>> >>>> -- >>>> 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 >> > > > > -- > 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 -- 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
