linux-kernel - Re: [RFC PATCH 00/10] KVM: x86/mmu: simplify argument to kvm page fault handler

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Message-ID: <CALzav=eSrEGt9Xn99YtmHnWE1hm7ExZ4o_wjn_Rc0ZokLpizeQ@mail.gmail.com>
Date:   Thu, 29 Jul 2021 10:24:13 -0700
From:   David Matlack <dmatlack@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Isaku Yamahata <isaku.yamahata@...il.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Isaku Yamahata <isaku.yamahata@...el.com>,
        kvm list <kvm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>
Subject: Re: [RFC PATCH 00/10] KVM: x86/mmu: simplify argument to kvm page
 fault handler

On Thu, Jul 29, 2021 at 10:17 AM Paolo Bonzini <pbonzini@...hat.com> wrote:
>
> On 29/07/21 18:48, David Matlack wrote:
> > On Thu, Jun 10, 2021 at 3:05 PM Isaku Yamahata <isaku.yamahata@...il.com> wrote:
> >>
> >> Thanks for feedback. Let me respin it.
> >
> > Hi Isaku,
> >
> > I'm working on a series to plumb the memslot backing the faulting gfn
> > through the page fault handling stack to avoid redundant lookups. This
> > would be much cleaner to implement on top of your struct
> > kvm_page_fault series than the existing code.
> >
> > Are you still planning to send another version of this series? Or if
> > you have decided to drop it or go in a different direction?
>
> I can work on this and post updated patches next week.

Sounds good. For the record I'm also looking at adding an per-vCPU LRU
slot, which *may* obviate the need to pass around the slot. (Isaku's
series is still a nice cleanup regardless.)

>
> Paolo
>