linux-kernel - Re: [PATCH v2 3/3] KVM: x86/mmu: Don't allow TDP MMU to yield when recovering NX pages

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Message-ID: <ebcbf024-8bfa-c284-68ea-3b59709cb8d0@redhat.com>
Date:   Fri, 26 Mar 2021 18:12:17 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Cc:     Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] KVM: x86/mmu: Don't allow TDP MMU to yield when
 recovering NX pages

On 25/03/21 23:25, Sean Christopherson wrote:
> I don't have a super strong preference.  One thought would be to
> assert that mmu_lock is held for write, and then it largely come
> future person's problem:-)

Well that is what I was going to suggest.  Let's keep things as simple 
as possible for the TDP MMU and build up slowly.

Paolo