Ryan Harper wrote: > * Jan Kiszka <jan.kiszka@xxxxxxxxxxx> [2009-12-02 12:18]: >> Ryan Harper wrote: >>> * Jan Kiszka <jan.kiszka@xxxxxxxxxxx> [2009-12-02 12:07]: >>>> Ryan Harper wrote: >>>>> * Jan Kiszka <jan.kiszka@xxxxxxxxxxx> [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 >>> >> So far, so consistent. Could you try kvm-kmod-2.6.32-rc7 on top of that? >> > > Sure, can you remind me of the kvm-kmod build magic for building that > branch? > If you want to build from git, check Wolfgang's nice README. But it might be easier to just download the tarball from sourceforge. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- 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
