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From: Wanpeng Li <kernellwp@gmail.com>
To: zhenwei pi <pizhenwei@bytedance.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Jonathan Corbet <corbet@lwn.net>,
	Wanpeng Li <wanpengli@tencent.com>,
	Sean Christopherson <seanjc@google.com>,
	LKML <linux-kernel@vger.kernel.org>,
	linux-doc@vger.kernel.org
Subject: Re: [PATCH] x86/kvm: Introduce boot parameter no-kvm-pvipi
Date: Wed, 20 Oct 2021 20:22:53 +0800	[thread overview]
Message-ID: <CANRm+CxAVA-L0wjm72eohXXWvh9fS7wVFzfKHuEjrsiRFuk9fg@mail.gmail.com> (raw)
In-Reply-To: <20211020120726.4022086-1-pizhenwei@bytedance.com>

On Wed, 20 Oct 2021 at 20:08, zhenwei pi <pizhenwei@bytedance.com> wrote:
>
> Although host side exposes KVM PV SEND IPI feature to guest side,
> guest should still have a chance to disable it.
>
> A typicall case of this parameter:
> If the host AMD server enables AVIC feature, the flat mode of APIC
> get better performance in the guest.

Hmm, I didn't find enough valuable information in your posting. We
observe AMD a lot before.
https://lore.kernel.org/all/CANRm+Cx597FNRUCyVz1D=B6Vs2GX3Sw57X7Muk+yMpi_hb+v1w@mail.gmail.com/T/#u

    Wanpeng

  reply	other threads:[~2021-10-20 12:23 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-20 12:07 [PATCH] x86/kvm: Introduce boot parameter no-kvm-pvipi zhenwei pi
2021-10-20 12:22 ` Wanpeng Li [this message]
2021-10-20 20:12   ` Sean Christopherson
2021-10-21  3:02     ` zhenwei pi
2021-10-21  5:03       ` Wanpeng Li
2021-10-21  7:17         ` zhenwei pi
2021-10-25  3:14           ` zhenwei pi
2021-10-26 16:04             ` Sean Christopherson
2021-10-27  0:46               ` Wanpeng Li

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