>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 -- 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
