* Jan Kiszka <jan.kis...@siemens.com> [2009-12-02 12:07]: > Ryan Harper wrote: > > * Jan Kiszka <jan.kis...@siemens.com> [2009-12-02 09:28]: > >> Hi, > >> > >> I'm facing stalled x86-64 guests after live migration when using kvm > >> (share disk images). This does not happen with x86-32 guests or when > >> disabling kvm. Both qemu and qemu-kvm git heads are affected (recent > >> vmstate fixes applied). Running I/O load during the migration (e.g. a > >> simple "ls -R /") seems to trigger it reliably. > >> > >> Can anyone confirm / comment on this? Do we fail to restore some magic > >> state that only long mode cares about? > > > > Just tested upstream qemu.git (with vmstate fixes) and I could migrate > > RHEL 5.3 64-bit guest with your light io load over localhost. I'll try > > remote hosts next. > > Hell, too many variables. It looks like the kernel modules have some if > not the ultimate impact: kvm-mod-2.6.31.6b on my 2.6.27 host works fine, > kvm-kmod stable-2.6.32 as well as master cause troubles. > > What is your host kernel and/or kvm module version?
Stock 64-bit Ubuntu Karmic: % uname -a Linux symmetry 2.6.31-15-generic #50-Ubuntu SMP Tue Nov 10 14:53:52 UTC 2009 x86_64 GNU/Linux % modinfo kvm filename: /lib/modules/2.6.31-15-generic/kernel/arch/x86/kvm/kvm.ko license: GPL author: Qumranet srcversion: 82D6B673524596F9CF3E84C depends: vermagic: 2.6.31-15-generic SMP mod_unload modversions parm: oos_shadow:bool % modinfo kvm-intel filename: /lib/modules/2.6.31-15-generic/kernel/arch/x86/kvm/kvm-intel.ko license: GPL author: Qumranet srcversion: 8FEA479DFCD7F174DA7864E depends: kvm vermagic: 2.6.31-15-generic SMP mod_unload modversions parm: bypass_guest_pf:bool parm: vpid:bool parm: flexpriority:bool parm: ept:bool parm: emulate_invalid_guest_state:bool -- Ryan Harper Software Engineer; Linux Technology Center IBM Corp., Austin, Tx ry...@us.ibm.com
