Re: [Qemu-devel] Re: disable clocksource=kvm-clock
Avi Kivity wrote: On 06/01/2010 04:57 PM, Peter Lieven wrote: Avi Kivity wrote: On 06/01/2010 04:12 PM, Peter Lieven wrote: hi, is it possible to avoid detection of clocksource=kvm_clock in a linux guest by patching the qemu-kvm binary? i would like to be able to avoid a guest detecting kvm-clock until bug #584516 is fixed without modifying all guest systems and reverting that later. Newer qemu-kvm's will have this feature (using -cpu ...,-kvmclock). with latest git, i can supply this switch, but cat /sys/devices/system/clocksource/clocksource0/current_clocksource still shows kvm_clock in an opensuse 11.2 64-bit or an ubuntu 10.04 64-bit guest. Try again with tomorrow's git, I sent out a patchset earlier today that fixes this. i don't see it in the git, do you mean: [PATCH 0/5] Use more cpuid bits from upstream thanks, peter
[Qemu-devel] Re: disable clocksource=kvm-clock
On 06/01/2010 04:12 PM, Peter Lieven wrote: hi, is it possible to avoid detection of clocksource=kvm_clock in a linux guest by patching the qemu-kvm binary? i would like to be able to avoid a guest detecting kvm-clock until bug #584516 is fixed without modifying all guest systems and reverting that later. Newer qemu-kvm's will have this feature (using -cpu ...,-kvmclock). -- error compiling committee.c: too many arguments to function
Re: [Qemu-devel] Re: disable clocksource=kvm-clock
Avi Kivity wrote: On 06/01/2010 04:12 PM, Peter Lieven wrote: hi, is it possible to avoid detection of clocksource=kvm_clock in a linux guest by patching the qemu-kvm binary? i would like to be able to avoid a guest detecting kvm-clock until bug #584516 is fixed without modifying all guest systems and reverting that later. Newer qemu-kvm's will have this feature (using -cpu ...,-kvmclock). with latest git, i can supply this switch, but cat /sys/devices/system/clocksource/clocksource0/current_clocksource still shows kvm_clock in an opensuse 11.2 64-bit or an ubuntu 10.04 64-bit guest.
Re: [Qemu-devel] Re: disable clocksource=kvm-clock
On 06/01/2010 04:57 PM, Peter Lieven wrote: Avi Kivity wrote: On 06/01/2010 04:12 PM, Peter Lieven wrote: hi, is it possible to avoid detection of clocksource=kvm_clock in a linux guest by patching the qemu-kvm binary? i would like to be able to avoid a guest detecting kvm-clock until bug #584516 is fixed without modifying all guest systems and reverting that later. Newer qemu-kvm's will have this feature (using -cpu ...,-kvmclock). with latest git, i can supply this switch, but cat /sys/devices/system/clocksource/clocksource0/current_clocksource still shows kvm_clock in an opensuse 11.2 64-bit or an ubuntu 10.04 64-bit guest. Try again with tomorrow's git, I sent out a patchset earlier today that fixes this. -- error compiling committee.c: too many arguments to function
Re: [Qemu-devel] Re: disable clocksource=kvm-clock
Avi Kivity wrote: On 06/01/2010 04:57 PM, Peter Lieven wrote: Avi Kivity wrote: On 06/01/2010 04:12 PM, Peter Lieven wrote: hi, is it possible to avoid detection of clocksource=kvm_clock in a linux guest by patching the qemu-kvm binary? i would like to be able to avoid a guest detecting kvm-clock until bug #584516 is fixed without modifying all guest systems and reverting that later. Newer qemu-kvm's will have this feature (using -cpu ...,-kvmclock). with latest git, i can supply this switch, but cat /sys/devices/system/clocksource/clocksource0/current_clocksource still shows kvm_clock in an opensuse 11.2 64-bit or an ubuntu 10.04 64-bit guest. Try again with tomorrow's git, I sent out a patchset earlier today that fixes this. avi, i do not know whats going on. but if i supply -cpu xxx,-kvmclock the guest still uses kvm-clock, but it seems bug #584516 is not triggered... thats weird... br, peter -- Mit freundlichen Grüßen/Kind Regards Peter Lieven .. KAMP Netzwerkdienste GmbH Vestische Str. 89-91 | 46117 Oberhausen Tel: +49 (0) 208.89 402-50 | Fax: +49 (0) 208.89 402-40 mailto:p...@kamp.de | http://www.kamp.de Geschäftsführer: Heiner Lante | Michael Lante Amtsgericht Duisburg | HRB Nr. 12154 USt-Id-Nr.: DE 120607556 .
Re: [Qemu-devel] Re: disable clocksource=kvm-clock
On 06/01/2010 05:06 PM, Peter Lieven wrote: avi, i do not know whats going on. but if i supply -cpu xxx,-kvmclock the guest still uses kvm-clock, but it seems bug #584516 is not triggered... thats weird... I guess that bug was resolved in qemu-kvm.git. Likely 1a03675db1, but it appears to be part of 0.12 too, so not sure. What qemu-kvm were you using previously? -- error compiling committee.c: too many arguments to function
Re: [Qemu-devel] Re: disable clocksource=kvm-clock
Avi Kivity wrote: On 06/01/2010 05:06 PM, Peter Lieven wrote: avi, i do not know whats going on. but if i supply -cpu xxx,-kvmclock the guest still uses kvm-clock, but it seems bug #584516 is not triggered... thats weird... I guess that bug was resolved in qemu-kvm.git. Likely 1a03675db1, but it appears to be part of 0.12 too, so not sure. What qemu-kvm were you using previously? i'm using qemu-kvm git from today (aa22e82). bug #585113 seems to be fixed (this was the irq nobody cared error with virtio_blk or e1000) bug #584516 is still there, but if I set - cpu xxx,-kvmclock it is not triggered. the guest shows current_clocksource = kvm_clock, but migration seems to succeed (at least the ~20 times i tested it since you told me about the flag) do you have a clue what fixed bug #585113. i would like to backport it to 0.12.4
