Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle

[Gleb Natapov]

On Thu, Mar 14, 2013 at 04:15:10AM +0000, Matthew Anderson wrote:
> Thanks for the suggestion but so far it hasn't made any difference.
> 
> I thought I may be an issue with the mainline kernel I was using so I changed 
> over to Ubuntu 12.10 and QEMU 1.2.0. Stability is slightly better but I still 
> get 2-3 VM's a day out of about 120 experiencing this bug in the exact same 
> way as before.  Time in the guest simply stop's ticking over and when you 
> attempt to interact with the VM the lost ticks get replayed as fast as 
> possible. Because of the time being out practically nothing works as it 
> breaks crypto support (as well as practically everything else).
> 
> In addition to what I posted previously I've tried -
> Setting the CPU type to host, qemu64 and kvm64
> Setting the machine type to 0.14, 0.15, 1.0, 1.1 and 1.2 (plus 1.3 and 1.4 
> from previous testing)
> With and without the HPET timer using combinations of the above
> 
> The settings I'm using work fine on the Centos 6.3 (2.6.32) kernel and QEMU 
> 1.4.0. I've only had this problem since upgrading the kernel which is the 
> only evidence I have of it being a kernel/KVM bug. I'm incredibly desparate 
> for any solution or advice that may lead to getting this problem sorted,I'm 
> getting a tyrade of angry phone called every morning that's making me want to 
> go postal. 
> 
Is this happening to all VMs on the same machine simultaneously?

--
                        Gleb.