linux-kernel - Re: [PATCH v2 04/10] mm/hugetlb: Move swap entry handling into vma lock when faulted

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Date:   Thu, 8 Dec 2022 12:31:48 -0800
From:   John Hubbard <jhubbard@...dia.com>
To:     Peter Xu <peterx@...hat.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Muchun Song <songmuchun@...edance.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        "James Houghton" <jthoughton@...gle.com>,
        Jann Horn <jannh@...gle.com>, Rik van Riel <riel@...riel.com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        "David Hildenbrand" <david@...hat.com>,
        Nadav Amit <nadav.amit@...il.com>
Subject: Re: [PATCH v2 04/10] mm/hugetlb: Move swap entry handling into vma
 lock when faulted

On 12/8/22 12:28, Peter Xu wrote:
>> +/*
>> + * There are a few special cases in which this function returns while still
>> + * holding locks. Those are noted inline.
>> + */
> 
> This is not true, I think?  It always releases all the locks.
Agreed. It just looks that way at first, and I guess it was getting
late when I wrote that part. :)

thanks,
-- 
John Hubbard
NVIDIA