From: Paolo Bonzini <pbonzini@redhat.com>
To: Marc Zyngier <maz@kernel.org>, Sean Christopherson <seanjc@google.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
linux-kernel@vger.kernel.org, David Matlack <dmatlack@google.com>,
Jing Zhang <jingzhangos@google.com>
Subject: Re: [PATCH 07/14] KVM: Don't block+unblock when halt-polling is successful
Date: Sun, 26 Sep 2021 08:27:28 +0200 [thread overview]
Message-ID: <80d90ee6-0d43-3735-5c26-be8c3d72d493@redhat.com> (raw)
In-Reply-To: <878rzlass2.wl-maz@kernel.org>
On 25/09/21 11:50, Marc Zyngier wrote:
>> there is no need for arm64 to put/load
>> the vGIC as KVM hasn't relinquished control of the vCPU in any way.
>
> This doesn't mean that there is no requirement for any state
> change. The put/load on GICv4 is crucial for performance, and the VMCR
> resync is a correctness requirement.
I wouldn't even say it's crucial for performance: halt polling cannot
work and is a waste of time without (the current implementation of)
put/load.
However, is activating the doorbell necessary? If possible, polling the
VGIC directly for pending VLPIs without touching the ITS (for example by
emulating IAR reads) may make sense. IIUC that must be done at EL2
though, so maybe it would even make sense to move all of halt polling to
EL2 for the nVHE case. It all depends on benchmark results, of course.
Sorry for the many stupid questions I'm asking lately, but I'm trying to
pay more attention to ARM and understand the VGIC and EL1/EL2 split better.
Paolo
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Marc Zyngier <maz@kernel.org>, Sean Christopherson <seanjc@google.com>
Cc: Wanpeng Li <wanpengli@tencent.com>,
kvm@vger.kernel.org, David Hildenbrand <david@redhat.com>,
linux-kernel@vger.kernel.org, Paul Mackerras <paulus@ozlabs.org>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
kvmarm@lists.cs.columbia.edu,
Janosch Frank <frankja@linux.ibm.com>,
Joerg Roedel <joro@8bytes.org>,
Huacai Chen <chenhuacai@kernel.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
kvm-ppc@vger.kernel.org, David Matlack <dmatlack@google.com>,
linux-arm-kernel@lists.infradead.org,
Jim Mattson <jmattson@google.com>,
Cornelia Huck <cohuck@redhat.com>,
linux-mips@vger.kernel.org,
Vitaly Kuznetsov <vkuznets@redhat.com>
Subject: Re: [PATCH 07/14] KVM: Don't block+unblock when halt-polling is successful
Date: Sun, 26 Sep 2021 08:27:28 +0200 [thread overview]
Message-ID: <80d90ee6-0d43-3735-5c26-be8c3d72d493@redhat.com> (raw)
In-Reply-To: <878rzlass2.wl-maz@kernel.org>
On 25/09/21 11:50, Marc Zyngier wrote:
>> there is no need for arm64 to put/load
>> the vGIC as KVM hasn't relinquished control of the vCPU in any way.
>
> This doesn't mean that there is no requirement for any state
> change. The put/load on GICv4 is crucial for performance, and the VMCR
> resync is a correctness requirement.
I wouldn't even say it's crucial for performance: halt polling cannot
work and is a waste of time without (the current implementation of)
put/load.
However, is activating the doorbell necessary? If possible, polling the
VGIC directly for pending VLPIs without touching the ITS (for example by
emulating IAR reads) may make sense. IIUC that must be done at EL2
though, so maybe it would even make sense to move all of halt polling to
EL2 for the nVHE case. It all depends on benchmark results, of course.
Sorry for the many stupid questions I'm asking lately, but I'm trying to
pay more attention to ARM and understand the VGIC and EL1/EL2 split better.
Paolo
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Marc Zyngier <maz@kernel.org>, Sean Christopherson <seanjc@google.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
linux-kernel@vger.kernel.org, David Matlack <dmatlack@google.com>,
Jing Zhang <jingzhangos@google.com>
Subject: Re: [PATCH 07/14] KVM: Don't block+unblock when halt-polling is successful
Date: Sun, 26 Sep 2021 08:27:28 +0200 [thread overview]
Message-ID: <80d90ee6-0d43-3735-5c26-be8c3d72d493@redhat.com> (raw)
In-Reply-To: <878rzlass2.wl-maz@kernel.org>
On 25/09/21 11:50, Marc Zyngier wrote:
>> there is no need for arm64 to put/load
>> the vGIC as KVM hasn't relinquished control of the vCPU in any way.
>
> This doesn't mean that there is no requirement for any state
> change. The put/load on GICv4 is crucial for performance, and the VMCR
> resync is a correctness requirement.
I wouldn't even say it's crucial for performance: halt polling cannot
work and is a waste of time without (the current implementation of)
put/load.
However, is activating the doorbell necessary? If possible, polling the
VGIC directly for pending VLPIs without touching the ITS (for example by
emulating IAR reads) may make sense. IIUC that must be done at EL2
though, so maybe it would even make sense to move all of halt polling to
EL2 for the nVHE case. It all depends on benchmark results, of course.
Sorry for the many stupid questions I'm asking lately, but I'm trying to
pay more attention to ARM and understand the VGIC and EL1/EL2 split better.
Paolo
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Marc Zyngier <maz@kernel.org>, Sean Christopherson <seanjc@google.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>,
Paul Mackerras <paulus@ozlabs.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
linux-kernel@vger.kernel.org, David Matlack <dmatlack@google.com>,
Jing Zhang <jingzhangos@google.com>
Subject: Re: [PATCH 07/14] KVM: Don't block+unblock when halt-polling is successful
Date: Sun, 26 Sep 2021 06:27:28 +0000 [thread overview]
Message-ID: <80d90ee6-0d43-3735-5c26-be8c3d72d493@redhat.com> (raw)
In-Reply-To: <878rzlass2.wl-maz@kernel.org>
On 25/09/21 11:50, Marc Zyngier wrote:
>> there is no need for arm64 to put/load
>> the vGIC as KVM hasn't relinquished control of the vCPU in any way.
>
> This doesn't mean that there is no requirement for any state
> change. The put/load on GICv4 is crucial for performance, and the VMCR
> resync is a correctness requirement.
I wouldn't even say it's crucial for performance: halt polling cannot
work and is a waste of time without (the current implementation of)
put/load.
However, is activating the doorbell necessary? If possible, polling the
VGIC directly for pending VLPIs without touching the ITS (for example by
emulating IAR reads) may make sense. IIUC that must be done at EL2
though, so maybe it would even make sense to move all of halt polling to
EL2 for the nVHE case. It all depends on benchmark results, of course.
Sorry for the many stupid questions I'm asking lately, but I'm trying to
pay more attention to ARM and understand the VGIC and EL1/EL2 split better.
Paolo
next prev parent reply other threads:[~2021-09-26 6:27 UTC|newest]
Thread overview: 192+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-25 0:55 [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` [PATCH 01/14] KVM: s390: Ensure kvm_arch_no_poll() is read once when blocking vCPU Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-27 6:54 ` Christian Borntraeger
2021-09-27 6:54 ` Christian Borntraeger
2021-09-27 6:54 ` Christian Borntraeger
2021-09-27 6:54 ` Christian Borntraeger
2021-09-25 0:55 ` [PATCH 02/14] KVM: Update halt-polling stats if and only if halt-polling was attempted Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 18:57 ` David Matlack
2021-09-28 18:57 ` David Matlack
2021-09-28 18:57 ` David Matlack
2021-09-28 18:57 ` David Matlack
2021-09-25 0:55 ` [PATCH 03/14] KVM: Refactor and document halt-polling stats update helper Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 19:01 ` David Matlack
2021-09-28 19:01 ` David Matlack
2021-09-28 19:01 ` David Matlack
2021-09-25 0:55 ` [PATCH 04/14] KVM: Reconcile discrepancies in halt-polling stats Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 21:26 ` David Matlack
2021-09-28 21:26 ` David Matlack
2021-09-28 21:26 ` David Matlack
2021-09-25 0:55 ` [PATCH 05/14] KVM: s390: Clear valid_wakeup in kvm_s390_handle_wait(), not in arch hook Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-25 0:55 ` [PATCH 06/14] KVM: Drop obsolete kvm_arch_vcpu_block_finish() Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-27 6:58 ` Christian Borntraeger
2021-09-28 21:28 ` David Matlack
2021-09-28 21:28 ` David Matlack
2021-09-28 21:28 ` David Matlack
2021-09-25 0:55 ` [PATCH 07/14] KVM: Don't block+unblock when halt-polling is successful Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 9:50 ` Marc Zyngier
2021-09-25 9:50 ` Marc Zyngier
2021-09-25 9:50 ` Marc Zyngier
2021-09-25 9:50 ` Marc Zyngier
2021-09-26 6:27 ` Paolo Bonzini [this message]
2021-09-26 6:27 ` Paolo Bonzini
2021-09-26 6:27 ` Paolo Bonzini
2021-09-26 6:27 ` Paolo Bonzini
2021-09-26 9:02 ` Marc Zyngier
2021-09-26 9:02 ` Marc Zyngier
2021-09-26 9:02 ` Marc Zyngier
2021-09-26 9:02 ` Marc Zyngier
2021-09-27 17:28 ` Sean Christopherson
2021-09-27 17:28 ` Sean Christopherson
2021-09-27 17:28 ` Sean Christopherson
2021-09-27 17:28 ` Sean Christopherson
2021-09-28 9:24 ` Marc Zyngier
2021-09-28 9:24 ` Marc Zyngier
2021-09-28 9:24 ` Marc Zyngier
2021-09-28 9:24 ` Marc Zyngier
2021-09-28 16:21 ` Sean Christopherson
2021-09-28 16:21 ` Sean Christopherson
2021-09-28 16:21 ` Sean Christopherson
2021-09-28 16:21 ` Sean Christopherson
2021-09-30 9:36 ` Marc Zyngier
2021-09-30 9:36 ` Marc Zyngier
2021-09-30 9:36 ` Marc Zyngier
2021-09-30 9:36 ` Marc Zyngier
2021-09-25 0:55 ` [PATCH 08/14] KVM: x86: Tweak halt emulation helper names to free up kvm_vcpu_halt() Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 21:59 ` David Matlack
2021-09-28 21:59 ` David Matlack
2021-09-28 21:59 ` David Matlack
2021-09-25 0:55 ` [PATCH 09/14] KVM: Rename kvm_vcpu_block() => kvm_vcpu_halt() Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-27 7:06 ` Christian Borntraeger
2021-09-27 7:06 ` Christian Borntraeger
2021-09-27 7:06 ` Christian Borntraeger
2021-09-27 7:06 ` Christian Borntraeger
2021-09-28 22:01 ` David Matlack
2021-09-28 22:01 ` David Matlack
2021-09-28 22:01 ` David Matlack
2021-09-28 22:01 ` David Matlack
2021-09-25 0:55 ` [PATCH 10/14] KVM: Split out a kvm_vcpu_block() helper from kvm_vcpu_halt() Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-27 7:41 ` Christian Borntraeger
2021-09-27 7:41 ` Christian Borntraeger
2021-09-27 7:41 ` Christian Borntraeger
2021-09-27 7:41 ` Christian Borntraeger
2021-09-28 22:03 ` David Matlack
2021-09-28 22:03 ` David Matlack
2021-09-28 22:03 ` David Matlack
2021-09-25 0:55 ` [PATCH 11/14] KVM: stats: Add stat to detect if vcpu is currently blocking Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 22:04 ` David Matlack
2021-09-28 22:04 ` David Matlack
2021-09-28 22:04 ` David Matlack
2021-09-25 0:55 ` [PATCH 12/14] KVM: Don't redo ktime_get() when calculating halt-polling stop/deadline Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 22:08 ` David Matlack
2021-09-28 22:08 ` David Matlack
2021-09-28 22:08 ` David Matlack
2021-09-25 0:55 ` [PATCH 13/14] KVM: x86: Directly block (instead of "halting") UNINITIALIZED vCPUs Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 22:12 ` David Matlack
2021-09-28 22:12 ` David Matlack
2021-09-28 22:12 ` David Matlack
2021-09-25 0:55 ` [PATCH 14/14] KVM: x86: Invoke kvm_vcpu_block() directly for non-HALTED wait states Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-25 0:55 ` Sean Christopherson
2021-09-28 22:14 ` David Matlack
2021-09-28 22:14 ` David Matlack
2021-09-28 22:14 ` David Matlack
2021-09-28 22:14 ` David Matlack
2021-09-27 7:22 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Christian Borntraeger
2021-09-27 7:22 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new st Christian Borntraeger
2021-09-27 7:22 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Christian Borntraeger
2021-09-27 7:22 ` Christian Borntraeger
2021-09-27 14:59 ` Sean Christopherson
2021-09-27 14:59 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Sean Christopherson
2021-09-27 14:59 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Sean Christopherson
2021-09-27 14:59 ` Sean Christopherson
2021-09-27 15:03 ` Paolo Bonzini
2021-09-27 15:03 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Paolo Bonzini
2021-09-27 15:03 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Paolo Bonzini
2021-09-27 15:03 ` Paolo Bonzini
2021-09-27 15:15 ` Sean Christopherson
2021-09-27 15:15 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Sean Christopherson
2021-09-27 15:15 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Sean Christopherson
2021-09-27 15:15 ` Sean Christopherson
2021-09-27 15:16 ` Christian Borntraeger
2021-09-27 15:16 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Christian Borntraeger
2021-09-27 15:16 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Christian Borntraeger
2021-09-27 15:16 ` Christian Borntraeger
2021-09-27 16:58 ` David Matlack
2021-09-27 16:58 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne David Matlack
2021-09-27 16:58 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) David Matlack
2021-09-27 16:58 ` David Matlack
2021-09-29 6:56 ` Christian Borntraeger
2021-09-29 6:56 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Christian Borntraeger
2021-09-29 6:56 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Christian Borntraeger
2021-09-29 6:56 ` Christian Borntraeger
2021-09-27 17:24 ` Paolo Bonzini
2021-09-27 17:24 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Paolo Bonzini
2021-09-27 17:24 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Paolo Bonzini
2021-09-27 17:24 ` Paolo Bonzini
2021-09-27 17:33 ` Sean Christopherson
2021-09-27 17:33 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne Sean Christopherson
2021-09-27 17:33 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) Sean Christopherson
2021-09-27 17:33 ` Sean Christopherson
2022-11-15 3:28 ` wangyanan (Y)
2022-11-15 3:28 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne wangyanan (Y)
2022-11-15 3:28 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) wangyanan (Y)
2022-11-15 3:28 ` wangyanan (Y)
2022-11-16 17:19 ` David Matlack
2022-11-16 17:19 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne David Matlack
2022-11-16 17:19 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) David Matlack
2022-11-16 17:19 ` David Matlack
2022-11-18 2:29 ` wangyanan (Y)
2022-11-18 2:29 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a ne wangyanan (Y)
2022-11-18 2:29 ` disabling halt polling broken? (was Re: [PATCH 00/14] KVM: Halt-polling fixes, cleanups and a new stat) wangyanan (Y)
2022-11-18 2:29 ` wangyanan (Y)
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