I would stick with reading changelog and save some trouble! On Thu, Dec 4, 2014 at 5:19 PM, Zhang Haoyu <zhanghy@xxxxxxxxxxx> 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. >> > Yes, > if you have the source, you can directly check it., > otherwise, decompile kvm.ko, because apic_clear_isr() is inline function, > which is called by apic_set_eoi(), you can check it, this method is a bit complicated. > Any better ideas? > >>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 -- 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
