Re: Make QEmu HPET disabled by default for KVM?

2010-03-14 Thread Dor Laor
On 03/14/2010 09:10 AM, Gleb Natapov wrote: On Sun, Mar 14, 2010 at 09:05:50AM +0200, Avi Kivity wrote: On 03/11/2010 09:08 PM, Marcelo Tosatti wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. As Gleb mentioned in

Re: Make QEmu HPET disabled by default for KVM?

2010-03-14 Thread Avi Kivity
On 03/14/2010 12:23 PM, Dor Laor wrote: On 03/14/2010 09:10 AM, Gleb Natapov wrote: On Sun, Mar 14, 2010 at 09:05:50AM +0200, Avi Kivity wrote: On 03/11/2010 09:08 PM, Marcelo Tosatti wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is

Re: Make QEmu HPET disabled by default for KVM?

2010-03-14 Thread Dor Laor
On 03/14/2010 12:27 PM, Avi Kivity wrote: On 03/14/2010 12:23 PM, Dor Laor wrote: On 03/14/2010 09:10 AM, Gleb Natapov wrote: On Sun, Mar 14, 2010 at 09:05:50AM +0200, Avi Kivity wrote: On 03/11/2010 09:08 PM, Marcelo Tosatti wrote: I have kept --no-hpet in my setup for months... Any

Re: Make QEmu HPET disabled by default for KVM?

2010-03-13 Thread Avi Kivity
On 03/11/2010 09:08 PM, Marcelo Tosatti wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. As Gleb mentioned in the other thread, reinjection will introduce another set of problems. Ideally all this timer

Re: Make QEmu HPET disabled by default for KVM?

2010-03-13 Thread Gleb Natapov
On Sun, Mar 14, 2010 at 09:05:50AM +0200, Avi Kivity wrote: On 03/11/2010 09:08 PM, Marcelo Tosatti wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. As Gleb mentioned in the other thread, reinjection will introduce

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Sheng Yang
On Thursday 11 March 2010 15:58:12 Avi Kivity wrote: On 03/11/2010 09:52 AM, Sheng Yang wrote: I think we have already suffered enough timer issues due to this(e.g. I can't boot up well on 2.6.18 kernel)... 2.6.18 as guest or as host? Guest I have kept --no-hpet in my setup for

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Avi Kivity
On 03/11/2010 10:23 AM, Sheng Yang wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. Seems like HPET reaction is too slow to satisfy some guests(for it would replace PIT). Here is the thread last time.

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Gleb Natapov
On Thu, Mar 11, 2010 at 10:28:12AM +0200, Avi Kivity wrote: On 03/11/2010 10:23 AM, Sheng Yang wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. Seems like HPET reaction is too slow to satisfy some guests(for it would

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Sheng Yang
On Thursday 11 March 2010 16:31:57 Gleb Natapov wrote: On Thu, Mar 11, 2010 at 10:28:12AM +0200, Avi Kivity wrote: On 03/11/2010 10:23 AM, Sheng Yang wrote: I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to some guests. Seems

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Gleb Natapov
On Thu, Mar 11, 2010 at 04:38:48PM +0800, Sheng Yang wrote: On Thursday 11 March 2010 16:31:57 Gleb Natapov wrote: On Thu, Mar 11, 2010 at 10:28:12AM +0200, Avi Kivity wrote: On 03/11/2010 10:23 AM, Sheng Yang wrote: I have kept --no-hpet in my setup for months... Any details

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Avi Kivity
On 03/11/2010 10:42 AM, Gleb Natapov wrote: On Thu, Mar 11, 2010 at 04:38:48PM +0800, Sheng Yang wrote: On Thursday 11 March 2010 16:31:57 Gleb Natapov wrote: On Thu, Mar 11, 2010 at 10:28:12AM +0200, Avi Kivity wrote: On 03/11/2010 10:23 AM, Sheng Yang wrote: I

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Gleb Natapov
On Thu, Mar 11, 2010 at 10:46:06AM +0200, Avi Kivity wrote: On 03/11/2010 10:42 AM, Gleb Natapov wrote: On Thu, Mar 11, 2010 at 04:38:48PM +0800, Sheng Yang wrote: On Thursday 11 March 2010 16:31:57 Gleb Natapov wrote: On Thu, Mar 11, 2010 at 10:28:12AM +0200, Avi Kivity wrote: On 03/11/2010

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Avi Kivity
On 03/11/2010 12:23 PM, Gleb Natapov wrote: If the problem it due to lost ticks reinjection may solve it, but only partially. What if IO thread haven't run even once during the time vcpu did clock source check? IIRC sometimes we trigger this even with in kernel PIT. That is true.

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Avi Kivity
On 03/11/2010 01:56 PM, Avi Kivity wrote: On 03/11/2010 12:23 PM, Gleb Natapov wrote: If the problem it due to lost ticks reinjection may solve it, but only partially. What if IO thread haven't run even once during the time vcpu did clock source check? IIRC sometimes we trigger this even

Re: Make QEmu HPET disabled by default for KVM?

2010-03-11 Thread Marcelo Tosatti
On Thu, Mar 11, 2010 at 09:58:12AM +0200, Avi Kivity wrote: On 03/11/2010 09:52 AM, Sheng Yang wrote: I think we have already suffered enough timer issues due to this(e.g. I can't boot up well on 2.6.18 kernel)... 2.6.18 as guest or as host? I have kept --no-hpet in my setup for

Make QEmu HPET disabled by default for KVM?

2010-03-10 Thread Sheng Yang
I think we have already suffered enough timer issues due to this(e.g. I can't boot up well on 2.6.18 kernel)... I have kept --no-hpet in my setup for months... -- regards Yang, Sheng -- To unsubscribe from this list: send the line unsubscribe kvm in the body of a message to

Re: Make QEmu HPET disabled by default for KVM?

2010-03-10 Thread Avi Kivity
On 03/11/2010 09:52 AM, Sheng Yang wrote: I think we have already suffered enough timer issues due to this(e.g. I can't boot up well on 2.6.18 kernel)... 2.6.18 as guest or as host? I have kept --no-hpet in my setup for months... Any details about the problems? HPET is important to