linux-kernel - Re: [PATCH v9 0/3] fix hugetlb MADV_DONTNEED vma

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Message-ID: <Y3GHH96+k10TZ4Rl@x1n>
Date:   Sun, 13 Nov 2022 19:09:03 -0500
From:   Peter Xu <peterx@...hat.com>
To:     Mike Kravetz <mike.kravetz@...cle.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Naoya Horiguchi <naoya.horiguchi@...ux.dev>,
        David Hildenbrand <david@...hat.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Mina Almasry <almasrymina@...gle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Rik van Riel <riel@...riel.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v9 0/3] fix hugetlb MADV_DONTNEED vma_lock handling

On Fri, Nov 11, 2022 at 03:26:25PM -0800, Mike Kravetz wrote:
> This series addresses the issue first reported in [1], and fully
> described in patch 3.  While exploring solutions to this issue,
> related problems with mmu notification calls were discovered.  The
> first two patches address those issues.
> 
> Previous discussions suggested further cleanup by removing the
> routine zap_page_range.  This is possible because zap_page_range_single
> is now exported, and all callers of zap_page_range pass ranges entirely
> within a single vma.  This work will be done in a later patch so as not
> to distract from this bug fix.
> 
> [1] https://lore.kernel.org/lkml/CAO4mrfdLMXsao9RF4fUE8-Wfde8xmjsKrTNMNC9wjUb6JudD0g@mail.gmail.com/
> 
> Mike Kravetz (3):
>   madvise: use zap_page_range_single for madvise dontneed
>   hugetlb: remove duplicate mmu notifications
>   hugetlb: don't delete vma_lock in hugetlb MADV_DONTNEED processing

Acked-by: Peter Xu <peterx@...hat.com>

-- 
Peter Xu