Re: [PATCH 08/10] KVM: x86: Remove periodic global clock updates

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On 18/04/2024 20:34, David Woodhouse wrote:
From: David Woodhouse <dwmw@xxxxxxxxxxxx>

This effectively reverts commit 332967a3eac0 ("x86: kvm: introduce
periodic global clock updates"). The periodic update was introduced to
propagate NTP corrections to the guest KVM clock, when the KVM clock was
based on CLOCK_MONOTONIC.

However, commit 53fafdbb8b21 ("KVM: x86: switch KVMCLOCK base to
monotonic raw clock") switched to using CLOCK_MONOTONIC_RAW as the basis
for the KVM clock, avoiding the NTP frequency skew altogether.

So the periodic update serves no purpose. Remove it.

Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
---
  arch/x86/kvm/x86.c | 25 -------------------------
  1 file changed, 25 deletions(-)


Reviewed-by: Paul Durrant <paul@xxxxxxx>





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