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. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux
