Jan Kiszka wrote: > Avi Kivity wrote: >> On 12/03/2009 09:23 PM, Jan Kiszka wrote: >>> Jan Kiszka wrote: >>> >>>> Problem 2 >>>> --------- >>>> Setup: qemu head with vmstate fixes. kvm-kmod master, 64-bit host& guest. >>>> Effect: The migration target either locks up or reboots immediately. >>>> I've nailed this down to 84d0b66c778d881eafca2a5d0d66678211c4e861. Every >>>> kvm module build before that works, everything including and after >>>> 26ede77f536d1bb369527a96c7fe7fdc8ba2f890 shows the effect (everything in >>>> between crashes the host for known reasons). It's still unclear if this >>>> is an kvm-kmod wrapping issue of the user-space return notifiers. Will >>>> check once problem #1 is understood. >>>> >>> It is kernel-related, using kvm.git as host kernel makes no difference. >>> >>> This may now mean that kvm is buggy or that it triggers some msr >>> save/restore related issues in qemu. Digging even deeper... >>> >> Does calling drop_user_return_notifiers() (static in x86.c, will need >> exporting) in vmx_load_host_state() within the preempt-disable region help? >> > > Nope. > It was a qemu bug, resolved by "KVM: x86: Fix initial kvm_has_msr_star". Jan
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