linux-kernel - Re: [PATCH v3 0/5] mm: A few cleanup patches around zap, shmem and uffd

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Message-ID: <YUDPxezHSd9BH955@t490s>
Date:   Tue, 14 Sep 2021 12:37:25 -0400
From:   Peter Xu <peterx@...hat.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Yang Shi <shy828301@...il.com>, Miaohe Lin <linmiaohe@...wei.com>,
        Alistair Popple <apopple@...dia.com>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Jerome Glisse <jglisse@...hat.com>,
        "Kirill A . Shutemov" <kirill@...temov.name>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Liam Howlett <liam.howlett@...cle.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>
Subject: Re: [PATCH v3 0/5] mm: A few cleanup patches around zap, shmem and
 uffd

On Wed, Sep 08, 2021 at 12:35:11PM -0400, Peter Xu wrote:
> [Based on linus/master, commit ac08b1c68d1b which should contain the recent -mm
>  pull, if not applicable, I can repost anytime]
> 
> v3:
> - Patch "mm: Add zap_skip_check_mapping() helper"
>   - In zap_skip_check_mapping() check zap_mapping first [Alistair]
> - Patch "mm: Add ZAP_FLAG_SKIP_SWAP and zap_flags":
>   - Fix English errors in commit message [David]
>   - Drop paragraph mentioning commit 22061a1ffabd in commit msg
>   - Set ZAP_FLAG_SKIP_SWAP for unmap_mapping_page() too
> - Pick up r-bs

Ping - patches 1-4 have at least 1 ack already, the last patch is missing ack.

The change is quite straightforward as right now we apply SKIP_SWAP to all
"details" users of zapping process, so no functional change intended.  It'll be
important for uffd-wp in the future because uffd-wp will start to use "details"
without setting SKIP_SWAP.

It would be great if anyone could help have a look at the last patch, thanks.

-- 
Peter Xu