linux-kernel - Re: [PATCH 01/13] mm: Update ptep_get

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Message-ID: <CAHk-=wijU_YHSZq5N7vYK+qHPX0aPkaePaGOyWk4aqMvvSXxJA@mail.gmail.com>
Date:   Sat, 29 Oct 2022 11:58:23 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Nadav Amit <nadav.amit@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>,
        John Hubbard <jhubbard@...dia.com>, X86 ML <x86@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        jroedel@...e.de, ubizjak@...il.com,
        Alistair Popple <apopple@...dia.com>
Subject: Re: [PATCH 01/13] mm: Update ptep_get_lockless()s comment

On Sat, Oct 29, 2022 at 11:36 AM Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
>
> Anyway, I think the best documentation for "this is what I meant" is
> simply the patch. Does this affect your PoC on your setup?

Here's a slightly cleaned up set with preliminary commit messages, and
an explanation for why some of the 'struct page' declarations were
moved around a bit in case you wondered about that part of the change
in the full patch.

The end result should be the same, so if you already looked at the
previous unified patch, never mind. But this one tries to make for a
better patch series.

Still not tested in any way, shape, or form. I decided I wanted to
send this one before booting into this and possibly blowing up ;^)

                   Linus

View attachment "0001-mm-zap_page_range-narrow-down-page-variable-scope.patch" of type "text/x-patch" (2124 bytes)

View attachment "0002-mm-make-sure-to-flush-TLB-before-marking-page-dcirty.patch" of type "text/x-patch" (7018 bytes)