linux-kernel - Re: [PATCH 00/18] KVM: Consolidate and optimize MMU notifiers

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Message-ID: <3a1dd877-7421-7628-4214-30483c4de10f@redhat.com>
Date:   Tue, 30 Mar 2021 21:48:48 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Ben Gardon <bgardon@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>, Huacai Chen <chenhuacai@...nel.org>,
        Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
        Paul Mackerras <paulus@...abs.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-mips@...r.kernel.org, kvm <kvm@...r.kernel.org>,
        kvm-ppc@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/18] KVM: Consolidate and optimize MMU notifiers

On 30/03/21 20:32, Ben Gardon wrote:
>> Patches 1-7 are x86 specific prep patches to play nice with moving
>> the hva->gfn memslot lookups into common code.  There ended up being waaay
>> more of these than I expected/wanted, but I had a hell of a time getting
>> the flushing logic right when shuffling the memslot and address space
>> loops.  In the end, I was more confident I got things correct by batching
>> the flushes.
>>
>> Patch 8 moves the existing API prototypes into common code.  It could
>> technically be dropped since the old APIs are gone in the end, but I
>> thought the switch to the new APIs would suck a bit less this way.
> Patches 1-8 look good to me. Feel free to add my Reviewed-by tag to those.
> I appreciate the care you took to make all those changes tiny and reviewable.
> 

Just finished reviewing that part too, they were very nice and I've 
queued them.  I'll continue tomorrow with the rest.

Paolo