linux-kernel - Re: [RFC PATCH v2 4/5] mm/autonuma: call .numa_protect() when page is protected for NUMA migrate

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Message-ID: <ZNndOm4EW5eIokJJ@yzhao56-desk.sh.intel.com>
Date:   Mon, 14 Aug 2023 15:52:26 +0800
From:   Yan Zhao <yan.y.zhao@...el.com>
To:     Nadav Amit <nadav.amit@...il.com>
CC:     linux-mm <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        <kvm@...r.kernel.org>, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Mike Kravetz <mike.kravetz@...cle.com>, <apopple@...dia.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Mike Rapoport <rppt@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        <kevin.tian@...el.com>, <david@...hat.com>
Subject: Re: [RFC PATCH v2 4/5] mm/autonuma: call .numa_protect() when page
 is protected for NUMA migrate

On Fri, Aug 11, 2023 at 11:52:53AM -0700, Nadav Amit wrote:
> 
> > On Aug 10, 2023, at 2:00 AM, Yan Zhao <yan.y.zhao@...el.com> wrote:
> > 
> > Call mmu notifier's callback .numa_protect() in change_pmd_range() when
> > a page is ensured to be protected by PROT_NONE for NUMA migration purpose.
> 
> Consider squashing with the previous patch. It’s better to see the user
> (caller) with the new functionality.
> 
> It would be useful to describe what the expected course of action that
> numa_protect callback should take.
Thanks! I'll do in this way when I prepare patches in future :)