Is this the correct function? kvm_lapic_set_eoi 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 -- 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
