linux-kernel - Re: [PATCH 00/13] mm/munlock: rework of mlock+munlock page handling

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Message-ID: <YgTDnd9MihFS4cjD@dhcp22.suse.cz>
Date:   Thu, 10 Feb 2022 08:49:49 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Hugh Dickins <hughd@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Alistair Popple <apopple@...dia.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Rik van Riel <riel@...riel.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Yu Zhao <yuzhao@...gle.com>, Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 00/13] mm/munlock: rework of mlock+munlock page handling

On Wed 09-02-22 14:59:19, Hugh Dickins wrote:
[...]
> Ah, but you're worrying about any previously-mapped pages when
> VM_LOCKONFAULT is established: those ones get done by mlock_pte_range()
> in 07/13, same as when VM_LOCKED is established - I checked again,
> VM_LOCKONFAULT is not set without VM_LOCKED.

Right you are. mlock_fixup->mlock_vma_pages_range is the missing piece.
This is called for both do_mlock and mlockall paths. So all good and
thanks for the clarification!

I will get back to this sometimes next week.
-- 
Michal Hocko
SUSE Labs