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Message-Id: <1585189202-1708-1-git-send-email-wanpengli@tencent.com>
Date: Thu, 26 Mar 2020 10:19:59 +0800
From: Wanpeng Li <kernellwp@...il.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <sean.j.christopherson@...el.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>
Subject: [PATCH 0/3] KVM: X86: Single target IPI fastpath enhancement
The original single target IPI fastpath patch forgot to filter the
ICR destination shorthand field. Multicast IPI is not suitable for
this feature since wakeup the multiple sleeping vCPUs will extend
the interrupt disabled time, it especially worse in the over-subscribe
and VM has a little bit more vCPUs scenario. Let's narrow it down to
single target IPI. In addition, this patchset micro-optimize virtual
IPI emulation sequence for fastpath.
Wanpeng Li (3):
KVM: X86: Delay read msr data iff writes ICR MSR
KVM: X86: Narrow down the IPI fastpath to single target IPI
KVM: X86: Micro-optimize IPI fastpath delay
arch/x86/kvm/lapic.c | 4 ++--
arch/x86/kvm/lapic.h | 1 +
arch/x86/kvm/x86.c | 14 +++++++++++---
3 files changed, 14 insertions(+), 5 deletions(-)
--
2.7.4
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