On Fri, 17 Feb 2017, Andy Lutomirski wrote:
> On Fri, Feb 17, 2017 at 2:14 AM, Vitaly Kuznetsov wrote:
> > Not only. As far as I understand (and I *think* K. Y. pointed this out)
> > when VM is migrating to another host TSC page clocksource is disabled for
> > extended period
On Fri, Feb 17, 2017 at 2:14 AM, Vitaly Kuznetsov wrote:
> Thomas Gleixner writes:
>
>> On Wed, 15 Feb 2017, Vitaly Kuznetsov wrote:
>>> Actually, we already have an implementation of TSC page update in KVM
>>> (see arch/x86/kvm/hyperv.c,
On Fri, 17 Feb 2017, Vitaly Kuznetsov wrote:
> Thomas Gleixner writes:
> > On Wed, 15 Feb 2017, Vitaly Kuznetsov wrote:
> >> Actually, we already have an implementation of TSC page update in KVM
> >> (see arch/x86/kvm/hyperv.c, kvm_hv_setup_tsc_page()) and the update does
> >>
Thomas Gleixner writes:
> On Wed, 15 Feb 2017, Vitaly Kuznetsov wrote:
>> Actually, we already have an implementation of TSC page update in KVM
>> (see arch/x86/kvm/hyperv.c, kvm_hv_setup_tsc_page()) and the update does
>> the following:
>>
>> 0) stash seq into seq_prev
>>
On Wed, 15 Feb 2017, Vitaly Kuznetsov wrote:
> Actually, we already have an implementation of TSC page update in KVM
> (see arch/x86/kvm/hyperv.c, kvm_hv_setup_tsc_page()) and the update does
> the following:
>
> 0) stash seq into seq_prev
> 1) seq = 0 making all reads from the page invalid
> 2)
Andy Lutomirski writes:
> On Tue, Feb 14, 2017 at 7:50 AM, Vitaly Kuznetsov wrote:
>> Thomas Gleixner writes:
>>
>>> On Tue, 14 Feb 2017, Vitaly Kuznetsov wrote:
>>>
Hi,
while we're still waiting for a definitive ACK
On Tue, Feb 14, 2017 at 7:50 AM, Vitaly Kuznetsov wrote:
> Thomas Gleixner writes:
>
>> On Tue, 14 Feb 2017, Vitaly Kuznetsov wrote:
>>
>>> Hi,
>>>
>>> while we're still waiting for a definitive ACK from Microsoft that the
>>> algorithm is good for SMP
Thomas Gleixner writes:
> On Tue, 14 Feb 2017, Vitaly Kuznetsov wrote:
>
>> Hi,
>>
>> while we're still waiting for a definitive ACK from Microsoft that the
>> algorithm is good for SMP case (as we can't prevent the code in vdso from
>> migrating between CPUs) I'd like to
On Tue, 14 Feb 2017, Vitaly Kuznetsov wrote:
> Hi,
>
> while we're still waiting for a definitive ACK from Microsoft that the
> algorithm is good for SMP case (as we can't prevent the code in vdso from
> migrating between CPUs) I'd like to send v2 with some modifications to keep
> the discussion
> -Original Message-
> From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com]
> Sent: Tuesday, February 14, 2017 4:44 AM
> To: x...@kernel.org; Andy Lutomirski
> Cc: Thomas Gleixner ; Ingo Molnar ;
> H. Peter Anvin
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