linux-kernel - Re: [PATCH v5 0/2] x86/kvm: Reduce vcpu_is

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Message-ID: <20170220195426.GF6515@twins.programming.kicks-ass.net>
Date:   Mon, 20 Feb 2017 20:54:26 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Jeremy Fitzhardinge <jeremy@...p.org>,
        Chris Wright <chrisw@...s-sol.org>,
        Alok Kataria <akataria@...are.com>,
        Rusty Russell <rusty@...tcorp.com.au>,
        Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>, linux-arch@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        xen-devel@...ts.xenproject.org, kvm@...r.kernel.org,
        Pan Xinhui <xinhui.pan@...ux.vnet.ibm.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>
Subject: Re: [PATCH v5 0/2] x86/kvm: Reduce vcpu_is_preempted() overhead

On Mon, Feb 20, 2017 at 01:36:02PM -0500, Waiman Long wrote:
> Waiman Long (2):
>   x86/paravirt: Change vcp_is_preempted() arg type to long
>   x86/kvm: Provide optimized version of vcpu_is_preempted() for x86-64
> 
>  arch/x86/include/asm/paravirt.h      |  2 +-
>  arch/x86/include/asm/qspinlock.h     |  2 +-
>  arch/x86/kernel/asm-offsets_64.c     |  9 +++++++++
>  arch/x86/kernel/kvm.c                | 26 +++++++++++++++++++++++++-
>  arch/x86/kernel/paravirt-spinlocks.c |  2 +-
>  5 files changed, 37 insertions(+), 4 deletions(-)

I'm assuming this will go through the KVM tree, if people want me to
take it through the tip tree, please let me know.

Acked-by: Peter Zijlstra (Intel) <peterz@...raded.org>