From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Anton Romanov <romanton@google.com>,
mtosatti@redhat.com, kvm@vger.kernel.org,
Sean Christopherson <seanjc@google.com>
Subject: Re: [PATCH v2] kvm: x86: Disable KVM_HC_CLOCK_PAIRING if tsc is in always catchup mode
Date: Thu, 17 Feb 2022 18:16:45 +0100 [thread overview]
Message-ID: <87mtippg5e.fsf@redhat.com> (raw)
In-Reply-To: <de6a1b73-c623-4776-2f14-b00917b7d22a@redhat.com>
Paolo Bonzini <pbonzini@redhat.com> writes:
> On 2/17/22 17:09, Vitaly Kuznetsov wrote:
...
>> (but I still mildly dislike using 'EOPNOTSUPP' for a temporary condition
>> on the host).
>
> It's not temporary, always-catchup is set on KVM_SET_TSC_KHZ and never
> goes away.
Even if the guest is migrated (back) to the host which supports TSC
scaling?
--
Vitaly
next prev parent reply other threads:[~2022-02-17 17:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-15 20:01 [PATCH v2] kvm: x86: Disable KVM_HC_CLOCK_PAIRING if tsc is in always catchup mode Anton Romanov
2022-02-16 14:14 ` Vitaly Kuznetsov
2022-02-17 15:41 ` Sean Christopherson
2022-02-17 16:09 ` Vitaly Kuznetsov
2022-02-17 17:14 ` Paolo Bonzini
2022-02-17 17:16 ` Vitaly Kuznetsov [this message]
2022-02-17 17:39 ` Paolo Bonzini
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