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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] BSOD when using Hyper-V extensions with Win2k8R2 guests |
Date: | Thu, 15 Mar 2012 15:00:11 -0500 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 |
On 03/15/2012 02:54 PM, Vadim Rozenfeld wrote:
On Thursday, March 15, 2012 09:14:39 PM Michael Roth wrote:Hi Vadim, I've been trying to use -cpu qemu64,hv_relaxed as a workaround for a CLOCK_WATCHDOG_TIMEOUT BSOD on Windows 2008 R2 guests when a vcpu's execution is delayed for an extended period. When I do this however I get the following the BSOD: http://msdn.microsoft.com/en-us/library/windows/hardware/ff559206(v=vs.85). aspx I've also tried -cpu qemu64,hv_spinlocks=4 and -cpu qemu64,hv_vapic as a sanity check and this results in the same error being thrown. Host is RHEL6.1 using latest qemu.git, guests are win2k8 server r2 (sameI'm pretty much sure that hyper-v support was not backported into RHEL 6.1 KVM.
So is there a hyper-v capability for KVM then? Or a CPUID feature? Should QEMU refuse to enable hv_relaxed if the capability isn't present? Regards, Anthony Liguori
Best regards, Vadim.behavior for both SP0 and SP1). Here's the full command-line: qemu-upstream -L ../qemu-build/pc-bios -cpu qemu64,hv_relaxed --enable-kvm \ -M pc-1.1 -enable-kvm -m 4096 -smp 4,sockets=4,cores=1,threads=1 \ -name ichigo-dom45 -nodefconfig -nodefaults -rtc base=utc,driftfix=slew \ -drive file=/scratch/mdroth/win2k8r2sp1.raw,if=none,id=drive0,format=raw,cache=wr itethrough,snapshot=on \ -device virtio-blk-pci,bus=pci.0,drive=drive0,id=disk0,bootindex=1 \ -netdev tap,id=hostnet0,script=/etc/qemu-ifup \ -device virtio-net-pci,netdev=hostnet0,id=net0,mac=00:FF:FE:00:00:2d,bus=pci.0 \ -device virtio-balloon-pci,id=balloon0,bus=pci.0 \ -usb -device usb-tablet,id=input0 -vnc 0.0.0.0:45 -vga cirrus Unfortunately the BSOD is too early to get a kernel dump, but here are the error params in case that's useful: 0xFC0000096, 0xF800027F6200, 0x0, 0x0 Let me know if you need any other details. Thanks!
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