Syzbot CI

Subject	Cleaning up the KVM clock mess
Author	dwmw2@infradead.org
Date	2026-07-28 14:39:41 +0000 UTC
Version
Cc	boris.ostrovsky@oracle.com bp@alien8.de corbet@lwn.net dave.hansen@linux.intel.com dongli.zhang@oracle.com dwmw2@infradead.org hpa@zytor.com jalliste@amazon.com jgross@suse.com jic23@kernel.org joe.jin@oracle.com joey.gouly@arm.com kvm@vger.kernel.org linux-doc@vger.kernel.org linux-kernel@vger.kernel.org linux-kselftest@vger.kernel.org maz@kernel.org mingo@redhat.com paul@xen.org pbonzini@redhat.com sascha.bischoff@arm.com seanjc@google.com skhan@linuxfoundation.org tglx@kernel.org vkuznets@redhat.com x86@kernel.org xen-devel@lists.xenproject.org

Subject

Author

dwmw2@infradead.org

Date

2026-07-28 14:39:41 +0000 UTC

Version

boris.ostrovsky@oracle.com bp@alien8.de corbet@lwn.net dave.hansen@linux.intel.com dongli.zhang@oracle.com dwmw2@infradead.org hpa@zytor.com jalliste@amazon.com jgross@suse.com jic23@kernel.org joe.jin@oracle.com joey.gouly@arm.com kvm@vger.kernel.org linux-doc@vger.kernel.org linux-kernel@vger.kernel.org linux-kselftest@vger.kernel.org maz@kernel.org mingo@redhat.com paul@xen.org pbonzini@redhat.com sascha.bischoff@arm.com seanjc@google.com skhan@linuxfoundation.org tglx@kernel.org vkuznets@redhat.com x86@kernel.org xen-devel@lists.xenproject.org

Name	Content [All]
[PATCH v7 01/36] KVM: x86: Improve accuracy of KVM clock when TSC scaling is in force	[Body]
[PATCH v7 02/36] KVM: x86: Explicitly disable TSC scaling without CONSTANT_TSC	[Body]
[PATCH v7 03/36] KVM: x86: Activate master clock immediately on vCPU creation	[Body]
[PATCH v7 04/36] KVM: x86: Avoid NTP frequency skew for KVM clock on 32-bit host	[Body]
[PATCH v7 05/36] KVM: x86: Fold __get_kvmclock() into get_kvmclock()	[Body]
[PATCH v7 06/36] KVM: x86: Drop CPU pinning in get_kvmclock()	[Body]
[PATCH v7 07/36] KVM: x86: Restructure get_kvmclock()	[Body]
[PATCH v7 08/36] KVM: x86: Fix KVM clock precision in get_kvmclock() with TSC scaling	[Body]
[PATCH v7 09/36] KVM: x86: Use get_kvmclock() in kvm_get_wall_clock_epoch()	[Body]
[PATCH v7 10/36] KVM: x86: Fix compute_guest_tsc() to handle negative time deltas	[Body]
[PATCH v7 11/36] KVM: x86: Restructure kvm_guest_time_update() for TSC upscaling	[Body]
[PATCH v7 12/36] KVM: x86: Simplify and comment kvm_get_time_scale()	[Body]
[PATCH v7 13/36] KVM: x86: Remove implicit rdtsc() from kvm_compute_l1_tsc_offset()	[Body]
[PATCH v7 14/36] KVM: x86: Improve synchronization in kvm_synchronize_tsc()	[Body]
[PATCH v7 15/36] KVM: x86: Kill last_tsc_{nsec,write,offset} fields	[Body]
[PATCH v7 16/36] KVM: x86: Replace nr_vcpus_matched_tsc count with all_vcpus_matched_tsc bool	[Body]
[PATCH v7 17/36] KVM: x86: Allow KVM master clock mode when TSCs are offset from each other	[Body]
[PATCH v7 18/36] KVM: x86: Factor out kvm_use_master_clock()	[Body]
[PATCH v7 19/36] KVM: x86: Avoid gratuitous global clock updates	[Body]
[PATCH v7 20/36] KVM: x86/xen: Prevent runstate times from becoming negative	[Body]
[PATCH v7 21/36] KVM: x86: Avoid redundant masterclock updates from multiple vCPUs	[Body]
[PATCH v7 22/36] KVM: x86: Remove runtime Xen TSC frequency CPUID update	[Body]
[PATCH v7 23/36] KVM: x86: Re-synchronize TSC after KVM_SET_TSC_KHZ	[Body]
[PATCH v7 24/36] KVM: x86: Use ktime_get_snapshot_id() for master clock	[Body]
[PATCH v7 25/36] KVM: x86: Compute kvmclock base without pvclock_gtod_data	[Body]
[PATCH v7 26/36] KVM: x86: Cache host vclock_mode for masterclock eligibility checks	[Body]
[PATCH v7 27/36] KVM: x86: Remove pvclock_gtod_data and private timekeeping code	[Body]
[PATCH v7 28/36] KVM: x86: Activate master clock from kvm_arch_init_vm()	[Body]
[PATCH v7 29/36] UAPI: x86: Move pvclock-abi to UAPI for x86 platforms	[Body]
[PATCH v7 30/36] KVM: selftests: Use UAPI pvclock-abi.h in xen_shinfo_test	[Body]
[PATCH v7 31/36] KVM: x86: Add KVM_[GS]ET_CLOCK_GUEST for accurate KVM clock migration	[Body]
[PATCH v7 32/36] KVM: x86: Add KVM_VCPU_TSC_SCALE and fix the documentation on TSC migration	[Body]
[PATCH v7 33/36] KVM: selftests: Add KVM/PV clock selftest to prove timer correction	[Body]
[PATCH v7 34/36] KVM: selftests: Add master clock offset test	[Body]
[PATCH v7 35/36] KVM: selftests: Add Xen/generic CPUID timing leaf test	[Body]
[PATCH v7 36/36] KVM: selftests: Add Xen runstate migration test	[Body]

Name

Content [All]

[PATCH v7 01/36] KVM: x86: Improve accuracy of KVM clock when TSC scaling is in force

[PATCH v7 02/36] KVM: x86: Explicitly disable TSC scaling without CONSTANT_TSC

[PATCH v7 03/36] KVM: x86: Activate master clock immediately on vCPU creation

[PATCH v7 04/36] KVM: x86: Avoid NTP frequency skew for KVM clock on 32-bit host

[PATCH v7 05/36] KVM: x86: Fold __get_kvmclock() into get_kvmclock()

[PATCH v7 06/36] KVM: x86: Drop CPU pinning in get_kvmclock()

[PATCH v7 07/36] KVM: x86: Restructure get_kvmclock()

[PATCH v7 08/36] KVM: x86: Fix KVM clock precision in get_kvmclock() with TSC scaling

[PATCH v7 09/36] KVM: x86: Use get_kvmclock() in kvm_get_wall_clock_epoch()

[PATCH v7 10/36] KVM: x86: Fix compute_guest_tsc() to handle negative time deltas

[PATCH v7 11/36] KVM: x86: Restructure kvm_guest_time_update() for TSC upscaling

[PATCH v7 12/36] KVM: x86: Simplify and comment kvm_get_time_scale()

[PATCH v7 13/36] KVM: x86: Remove implicit rdtsc() from kvm_compute_l1_tsc_offset()

[PATCH v7 14/36] KVM: x86: Improve synchronization in kvm_synchronize_tsc()

[PATCH v7 15/36] KVM: x86: Kill last_tsc_{nsec,write,offset} fields

[PATCH v7 16/36] KVM: x86: Replace nr_vcpus_matched_tsc count with all_vcpus_matched_tsc bool

[PATCH v7 17/36] KVM: x86: Allow KVM master clock mode when TSCs are offset from each other

[PATCH v7 18/36] KVM: x86: Factor out kvm_use_master_clock()

[PATCH v7 19/36] KVM: x86: Avoid gratuitous global clock updates

[PATCH v7 20/36] KVM: x86/xen: Prevent runstate times from becoming negative

[PATCH v7 21/36] KVM: x86: Avoid redundant masterclock updates from multiple vCPUs

[PATCH v7 22/36] KVM: x86: Remove runtime Xen TSC frequency CPUID update

[PATCH v7 23/36] KVM: x86: Re-synchronize TSC after KVM_SET_TSC_KHZ

[PATCH v7 24/36] KVM: x86: Use ktime_get_snapshot_id() for master clock

[PATCH v7 25/36] KVM: x86: Compute kvmclock base without pvclock_gtod_data

[PATCH v7 26/36] KVM: x86: Cache host vclock_mode for masterclock eligibility checks

[PATCH v7 27/36] KVM: x86: Remove pvclock_gtod_data and private timekeeping code

[PATCH v7 28/36] KVM: x86: Activate master clock from kvm_arch_init_vm()

[PATCH v7 29/36] UAPI: x86: Move pvclock-abi to UAPI for x86 platforms

[PATCH v7 30/36] KVM: selftests: Use UAPI pvclock-abi.h in xen_shinfo_test

[PATCH v7 31/36] KVM: x86: Add KVM_[GS]ET_CLOCK_GUEST for accurate KVM clock migration

[PATCH v7 32/36] KVM: x86: Add KVM_VCPU_TSC_SCALE and fix the documentation on TSC migration

[PATCH v7 33/36] KVM: selftests: Add KVM/PV clock selftest to prove timer correction

[PATCH v7 34/36] KVM: selftests: Add master clock offset test

[PATCH v7 35/36] KVM: selftests: Add Xen/generic CPUID timing leaf test

[PATCH v7 36/36] KVM: selftests: Add Xen runstate migration test

Session 2026-07-28

Steps Failed

ID (for dev)	7985fe3a-320c-4976-a297-d046da8eade4
Status	finished
Triaged	OK [Log] [Trajectory]
Execution Log	[Link]

Test	Base	Patched	Verdict
[KASAN] Build Base	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config]		passed [Log]
[KASAN] Boot test: Base	a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config]		passed [Log]
[KASAN] Build Patched		a204badd8432f93b7e862e7dac6db0fe3d65f370 [Config] [Log] [patched]	failed [Log]
[invalidated] kernel build error Log

Patches (36)

Series Summary

Sessions

Session 2026-07-28