Re: [PATCH v4 1/3] KVM: fix steal clock warp during guest cpu hotplug

2016-06-07 Thread John Stultz
On Tue, Jun 7, 2016 at 4:52 AM, Wanpeng Li wrote: > 2016-06-07 18:39 GMT+08:00 Paolo Bonzini : > [...] >> >> John Stultz also reported a similar issue after guest S3. > > Since there is cpu hot-unplug during S3. While I'm excited to finally see some progress on this, I unfortunately can't verify

Re: [PATCH v4 1/3] KVM: fix steal clock warp during guest cpu hotplug

2016-06-07 Thread Wanpeng Li
2016-06-07 18:39 GMT+08:00 Paolo Bonzini : [...] > > John Stultz also reported a similar issue after guest S3. Since there is cpu hot-unplug during S3. Regards, Wanpeng Li

Re: [PATCH v4 1/3] KVM: fix steal clock warp during guest cpu hotplug

2016-06-07 Thread Wanpeng Li
2016-06-07 18:39 GMT+08:00 Paolo Bonzini : > > > On 07/06/2016 09:59, Wanpeng Li wrote: >> From: Wanpeng Li >> >> I observed that sometimes st is 100% instantaneous, then idle is 100% >> even if there is a cpu hog on the guest cpu after the cpu hotplug comes >> back(N.B. this can not always be rea

Re: [PATCH v4 1/3] KVM: fix steal clock warp during guest cpu hotplug

2016-06-07 Thread Paolo Bonzini
On 07/06/2016 09:59, Wanpeng Li wrote: > From: Wanpeng Li > > I observed that sometimes st is 100% instantaneous, then idle is 100% > even if there is a cpu hog on the guest cpu after the cpu hotplug comes > back(N.B. this can not always be readily reproduced). I add trace to > capture it as

[PATCH v4 1/3] KVM: fix steal clock warp during guest cpu hotplug

2016-06-07 Thread Wanpeng Li
From: Wanpeng Li I observed that sometimes st is 100% instantaneous, then idle is 100% even if there is a cpu hog on the guest cpu after the cpu hotplug comes back(N.B. this can not always be readily reproduced). I add trace to capture it as below: cpuhp/1-12[001] d.h1 167.461657: accou