[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle
From: |
Alex Bligh |
Subject: |
Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle |
Date: |
Wed, 30 Oct 2013 07:26:10 +0000 |
On 30 Oct 2013, at 01:29, Xiexiangyou wrote:
> RTC timer may stop after live migration if you set the rtc_clock =
> host_clock. Because the different hosts have different system time.
> Rtc is waiting for the next_periodic_time after migrating, it may wait more
> longer. During the time, VM will lose one tick with great possibility,
Surely at worst this should wait until the destination RTC catches up?
> and the RTC periodic timer interrupt is blocked by "ioapic->irr==1" in KVM
> module.
Don't understand the significance of that. Why would the ioapic register be
different after migration than before?
> To solve the problem, you can try "rtc_clock = vm_clock"(HPET is ok because
> it using vm_clock). Like this:
> <clock offset='utc'>
> <timer name='rtc' tickpolicy='catchup' track='guest'/>
> <timer name='hpet' present='no'/>
> </clock>
>
> I hope it will help you.
--
Alex Bligh
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, (continued)
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Alex Bligh, 2013/10/21
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Xiexiangyou, 2013/10/22
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Alex Bligh, 2013/10/22
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Matthew Anderson, 2013/10/28
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Alex Bligh, 2013/10/28
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Alex Bligh, 2013/10/28
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Xiexiangyou, 2013/10/29
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Alex Bligh, 2013/10/30
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Paolo Bonzini, 2013/10/28
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle, Xiexiangyou, 2013/10/29
- Re: [Qemu-devel] BUG: RTC issue when Windows guest is idle,
Alex Bligh <=