linux-kernel - Re: [PATCH V2 0/5] KVM: X86: permission

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Message-ID: <5cc80cc7-8088-3bb7-4bbe-40c527465658@redhat.com>
Date:   Tue, 15 Mar 2022 22:06:02 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Lai Jiangshan <jiangshan.ljs@...group.com>
Subject: Re: [PATCH V2 0/5] KVM: X86: permission_fault() for SMAP

On 3/11/22 08:03, Lai Jiangshan wrote:
> From: Lai Jiangshan<jiangshan.ljs@...group.com>
> 
> Some change in permission_fault() for SMAP.  It also reduces
> calls two callbacks to get CPL and RFLAGS in come cases, but it
> has not any measurable performance change in tests (kernel build
> in guest).

I am going to queue patches 1-4.  The last one shouldn't really have any 
performance impact with static calls.

Paolo