linux-kernel - Re: [PATCH v3 0/6] tlb: Fix (soft-)dirty bit management & clean up API

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Message-ID: <CAHk-=wibdV-nJxf77npZU8DadAMups90jAjPPAnV4Jnsemn7iQ@mail.gmail.com>
Date:   Thu, 28 Jan 2021 09:14:24 -0800
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Will Deacon <will@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Android Kernel Team <kernel-team@...roid.com>,
        Linux-MM <linux-mm@...ck.org>, Yu Zhao <yuzhao@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mohamed Alzayat <alzayat@...-sws.org>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>,
        Nadav Amit <namit@...are.com>,
        Andrea Arcangeli <aarcange@...hat.com>
Subject: Re: [PATCH v3 0/6] tlb: Fix (soft-)dirty bit management & clean up API

On Wed, Jan 27, 2021 at 3:54 PM Will Deacon <will@...nel.org> wrote:
>
> The objective is to fix the lacklustre TLB invalidation on the clear_refs
> path and then augment the mmu_gather API to make it more difficult to
> abuse.

The series continues to look good to me.

I don't love our "tlb_flush_pending" hackery, but it is what it is,
and at least this series cleans up the proper flushing interfaces.

           Linus