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Subject: Re: [PATCH 01/13] mm: Update ptep_get_lockless()s comment
From:   Nadav Amit <nadav.amit@gmail.com>
In-Reply-To: <A48A5CEB-2C02-4101-B315-6792D042C605@gmail.com>
Date:   Sun, 30 Oct 2022 21:55:11 -0700
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Jann Horn <jannh@google.com>,
        John Hubbard <jhubbard@nvidia.com>, X86 ML <x86@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        kernel list <linux-kernel@vger.kernel.org>,
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        Andrea Arcangeli <aarcange@redhat.com>,
        "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
        jroedel@suse.de, ubizjak@gmail.com,
        Alistair Popple <apopple@nvidia.com>
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To:     Linus Torvalds <torvalds@linux-foundation.org>
Precedence: bulk

On Oct 30, 2022, at 9:09 PM, Nadav Amit <nadav.amit@gmail.com> wrote:

> I understand from the code that you decided to drop the deferring of
> set_page_dirty(), which could - at least for the munmap case (where
> mmap_lock is taken for write) - prevent the need for =E2=80=9Cforce_flus=
h=E2=80=9D and
> potentially save TLB flushes.
>=20
> I was just wondering whether the reason for that is that you wanted
> to have small backportable and conservative patches, or whether you
> changed your mind about it.

Please ignore this silly question. I understand - the buffers might =
still be
dropped.=