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Re: [PATCH 07/18] Fix deep C-state TSC desynchronization

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From: Rik van Riel
Subject: Re: [PATCH 07/18] Fix deep C-state TSC desynchronization
Date: Wednesday, July 14, 2010 - 9:14 am

On 07/12/2010 10:25 PM, Zachary Amsden wrote:

Reviewed-by: Rik van Riel <riel@redhat.com>

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Messages in current thread:
KVM timekeeping fixes, V2, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 01/18] Make TSC offset writes non-preemptible, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 02/18] Fix SVM VMCB reset, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 03/18] TSC reset compensation, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 05/18] Warn about unstable TSC, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 06/18] Unify TSC logic, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 07/18] Fix deep C-state TSC desynchronization, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 08/18] Add helper functions for time computation, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 09/18] Robust TSC compensation, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 10/18] Keep SMP VMs more in sync on unstable TSC, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 11/18] Perform hardware_enable in CPU_STARTING callback, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 12/18] Add clock sync request to hardware enable, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 13/18] Move scale_delta into common header, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 14/18] Fix a possible backwards warp of kvmclock, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 15/18] Implement getnsboottime kernel API, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 16/18] Use getnsboottime in KVM, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 17/18] Indicate reliable TSC in kvmclock, Zachary Amsden, (Mon Jul 12, 7:25 pm)
[PATCH 18/18] Add timekeeping documentation, Zachary Amsden, (Mon Jul 12, 7:25 pm)
Re: [PATCH 09/18] Robust TSC compensation, Marcelo Tosatti, (Tue Jul 13, 1:34 pm)
Re: [PATCH 09/18] Robust TSC compensation, Zachary Amsden, (Tue Jul 13, 2:15 pm)
Re: [PATCH 01/18] Make TSC offset writes non-preemptible, Rik van Riel, (Tue Jul 13, 2:33 pm)
Re: [PATCH 02/18] Fix SVM VMCB reset, Rik van Riel, (Tue Jul 13, 2:37 pm)
Re: [PATCH 09/18] Robust TSC compensation, David S. Ahern, (Tue Jul 13, 2:42 pm)
Re: [PATCH 09/18] Robust TSC compensation, Zachary Amsden, (Tue Jul 13, 2:45 pm)
Re: [PATCH 03/18] TSC reset compensation, Rik van Riel, (Tue Jul 13, 3:11 pm)
Re: [PATCH 09/18] Robust TSC compensation, Zachary Amsden, (Tue Jul 13, 4:32 pm)
Re: [PATCH 18/18] Add timekeeping documentation, Takuya Yoshikawa, (Wed Jul 14, 12:16 am)
Re: [PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Rik van Riel, (Wed Jul 14, 7:41 am)
Re: [PATCH 05/18] Warn about unstable TSC, Rik van Riel, (Wed Jul 14, 8:02 am)
Re: [PATCH 06/18] Unify TSC logic, Rik van Riel, (Wed Jul 14, 8:53 am)
Re: [PATCH 07/18] Fix deep C-state TSC desynchronization, Rik van Riel, (Wed Jul 14, 9:14 am)
Re: [PATCH 08/18] Add helper functions for time computation, Rik van Riel, (Wed Jul 14, 12:02 pm)
Re: [PATCH 18/18] Add timekeeping documentation, Zachary Amsden, (Wed Jul 14, 1:28 pm)
Re: [PATCH 09/18] Robust TSC compensation, Rik van Riel, (Wed Jul 14, 3:33 pm)
Re: [PATCH 10/18] Keep SMP VMs more in sync on unstable TSC, Rik van Riel, (Wed Jul 14, 7:13 pm)
Re: [PATCH 11/18] Perform hardware_enable in CPU_STARTING ..., Rik van Riel, (Wed Jul 14, 7:15 pm)
Re: [PATCH 12/18] Add clock sync request to hardware enable, Rik van Riel, (Wed Jul 14, 7:32 pm)
Re: [PATCH 13/18] Move scale_delta into common header, Rik van Riel, (Wed Jul 14, 7:35 pm)
Re: [PATCH 14/18] Fix a possible backwards warp of kvmclock, Rik van Riel, (Wed Jul 14, 7:37 pm)
Re: [PATCH 15/18] Implement getnsboottime kernel API, Rik van Riel, (Wed Jul 14, 7:41 pm)
Re: [PATCH 16/18] Use getnsboottime in KVM, Rik van Riel, (Wed Jul 14, 7:43 pm)
Re: [PATCH 17/18] Indicate reliable TSC in kvmclock, Rik van Riel, (Wed Jul 14, 7:44 pm)
Re: KVM timekeeping fixes, V2, Joerg Roedel, (Fri Jul 16, 6:19 am)
Re: KVM timekeeping fixes, V2, Zachary Amsden, (Fri Jul 16, 10:20 am)
Re: KVM timekeeping fixes, V2, Joerg Roedel, (Fri Jul 16, 12:26 pm)
Re: KVM timekeeping fixes, V2, Avi Kivity, (Sun Jul 18, 7:22 am)
Re: [PATCH 01/18] Make TSC offset writes non-preemptible, Avi Kivity, (Sun Jul 18, 7:28 am)
Re: [PATCH 01/18] Make TSC offset writes non-preemptible, Avi Kivity, (Sun Jul 18, 7:30 am)
Re: [PATCH 03/18] TSC reset compensation, Avi Kivity, (Sun Jul 18, 7:34 am)
Re: [PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Avi Kivity, (Sun Jul 18, 7:45 am)
Re: [PATCH 05/18] Warn about unstable TSC, Avi Kivity, (Sun Jul 18, 7:47 am)
Re: [PATCH 09/18] Robust TSC compensation, Avi Kivity, (Sun Jul 18, 7:52 am)
Re: [PATCH 15/18] Implement getnsboottime kernel API, Avi Kivity, (Sun Jul 18, 8:07 am)
Re: KVM timekeeping fixes, V2, Avi Kivity, (Sun Jul 18, 8:08 am)
Re: KVM timekeeping fixes, V2, Zachary Amsden, (Mon Jul 19, 1:11 am)
Re: [PATCH 03/18] TSC reset compensation, Zachary Amsden, (Mon Jul 19, 1:01 pm)
Re: [PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Zachary Amsden, (Mon Jul 19, 1:06 pm)
Re: [PATCH 09/18] Robust TSC compensation, Zachary Amsden, (Mon Jul 19, 1:39 pm)
Re: [PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Avi Kivity, (Tue Jul 20, 1:53 am)
Re: [PATCH 04/18] Make cpu_tsc_khz updates use local CPU, Zachary Amsden, (Tue Jul 20, 2:57 pm)