From: Sean Christopherson <seanjc@google.com>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Dongli Zhang <dongli.zhang@oracle.com>,
kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
x86@kernel.org, Marc Zyngier <maz@kernel.org>,
Juergen Gross <jgross@suse.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Paul Durrant <paul@xen.org>, Jonathan Cameron <jic23@kernel.org>,
Sascha Bischoff <Sascha.Bischoff@arm.com>,
Jack Allister <jalliste@amazon.com>,
Joey Gouly <joey.gouly@arm.com>,
joe.jin@oracle.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
linux-kselftest@vger.kernel.org
Subject: Re: [PATCH v4 04/30] KVM: x86: Add KVM_[GS]ET_CLOCK_GUEST for accurate KVM clock migration
Date: Mon, 18 May 2026 13:52:52 -0700 [thread overview]
Message-ID: <agt8JM43BlLPU-kr@google.com> (raw)
In-Reply-To: <d3c461415e05345a9b82e6f995828c1ae64a4e61.camel@infradead.org>
On Mon, May 18, 2026, David Woodhouse wrote:
> On Mon, 2026-05-18 at 00:52 -0700, Dongli Zhang wrote:
> > On 5/9/26 3:46 PM, David Woodhouse wrote:
>
> Huh, I didn't write that then; it isn't September yet. Did you mean
> 2026-05-09? We aren't all in the US...
>
> Strictly speaking, you just misattributed a quote of mine, which is
> very poor form :)
But also pretty darn hilarious given that the thread is all about accurate
timekeeping :-)
next prev parent reply other threads:[~2026-05-18 20:52 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-09 22:46 [PATCH v4] 00/30] Cleaning up the KVM clock mess David Woodhouse
2026-05-09 22:46 ` [PATCH v4 01/30] KVM: x86/xen: Do not corrupt KVM clock in kvm_xen_shared_info_init() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 02/30] KVM: x86: Improve accuracy of KVM clock when TSC scaling is in force David Woodhouse
2026-05-09 22:46 ` [PATCH v4 03/30] UAPI: x86: Move pvclock-abi to UAPI for x86 platforms David Woodhouse
2026-05-19 7:35 ` Dongli Zhang
2026-05-19 7:56 ` David Woodhouse
2026-05-09 22:46 ` [PATCH v4 04/30] KVM: x86: Add KVM_[GS]ET_CLOCK_GUEST for accurate KVM clock migration David Woodhouse
2026-05-18 7:52 ` Dongli Zhang
2026-05-18 8:48 ` David Woodhouse
2026-05-18 20:52 ` Sean Christopherson [this message]
2026-05-19 0:57 ` Dongli Zhang
2026-05-19 7:50 ` David Woodhouse
2026-05-19 21:23 ` Dongli Zhang
2026-05-19 22:43 ` David Woodhouse
2026-05-19 23:34 ` Dongli Zhang
2026-05-09 22:46 ` [PATCH v4 05/30] KVM: selftests: Add KVM/PV clock selftest to prove timer correction David Woodhouse
2026-05-09 22:46 ` [PATCH v4 06/30] KVM: x86: Explicitly disable TSC scaling without CONSTANT_TSC David Woodhouse
2026-05-09 22:46 ` [PATCH v4 07/30] KVM: x86: Add KVM_VCPU_TSC_SCALE and fix the documentation on TSC migration David Woodhouse
2026-05-09 22:46 ` [PATCH v4 08/30] KVM: x86: Avoid NTP frequency skew for KVM clock on 32-bit host David Woodhouse
2026-05-09 22:46 ` [PATCH v4 09/30] KVM: x86: WARN if kvm_get_walltime_and_clockread() fails unexpectedly David Woodhouse
2026-05-09 22:46 ` [PATCH v4 10/30] KVM: x86: Fold __get_kvmclock() into get_kvmclock() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 11/30] KVM: x86: Add WARN and restructure get_kvmclock() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 12/30] KVM: x86: Use get_kvmclock_base_ns() as fallback in get_kvmclock() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 13/30] KVM: x86: Fix KVM clock precision in get_kvmclock() with TSC scaling David Woodhouse
2026-05-09 22:46 ` [PATCH v4 14/30] KVM: x86: Use get_kvmclock() in kvm_get_wall_clock_epoch() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 15/30] KVM: x86: Fix compute_guest_tsc() to handle negative time deltas David Woodhouse
2026-05-09 22:46 ` [PATCH v4 16/30] KVM: x86: Restructure kvm_guest_time_update() for TSC upscaling David Woodhouse
2026-05-19 7:38 ` Dongli Zhang
2026-05-19 7:54 ` David Woodhouse
2026-05-09 22:46 ` [PATCH v4 17/30] KVM: x86: Simplify and comment kvm_get_time_scale() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 18/30] KVM: x86: Remove implicit rdtsc() from kvm_compute_l1_tsc_offset() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 19/30] KVM: x86: Improve synchronization in kvm_synchronize_tsc() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 20/30] KVM: x86: Kill last_tsc_{nsec,write,offset} fields David Woodhouse
2026-05-09 22:46 ` [PATCH v4 21/30] KVM: x86: Replace nr_vcpus_matched_tsc count with all_vcpus_matched_tsc bool David Woodhouse
2026-05-09 22:46 ` [PATCH v4 22/30] KVM: x86: Allow KVM master clock mode when TSCs are offset from each other David Woodhouse
2026-05-09 22:46 ` [PATCH v4 23/30] KVM: x86: Factor out kvm_use_master_clock() David Woodhouse
2026-05-09 22:46 ` [PATCH v4 24/30] KVM: x86: Avoid gratuitous global clock updates David Woodhouse
2026-05-09 22:46 ` [PATCH v4 25/30] KVM: x86/xen: Prevent runstate times from becoming negative David Woodhouse
2026-05-09 22:46 ` [PATCH v4 26/30] KVM: x86: Avoid redundant masterclock updates from multiple vCPUs David Woodhouse
2026-05-09 22:46 ` [PATCH v4 27/30] KVM: x86: Add KVM_VCPU_TSC_EFFECTIVE_FREQ attribute David Woodhouse
2026-05-09 22:46 ` [PATCH v4 28/30] KVM: x86: Remove runtime Xen TSC frequency CPUID update David Woodhouse
2026-05-09 22:46 ` [PATCH v4 29/30] x86/kvm: Obtain TSC frequency from CPUID if present David Woodhouse
2026-05-09 22:46 ` [PATCH v4 30/30] x86/xen: " David Woodhouse
2026-05-10 20:56 ` [PATCH v4 33/30] KVM: selftests: Add Xen runstate migration test David Woodhouse
2026-05-10 20:58 ` [PATCH v4 31/30] KVM: selftests: Add Xen/generic CPUID timing leaf test David Woodhouse
2026-05-10 21:05 ` [PATCH v4 32/30] KVM: x86: Re-synchronize TSC after KVM_SET_TSC_KHZ David Woodhouse
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