linux-kernel - Re: [PATCH v1 0/4] smaps / mm/gup: fix gup_can_follow

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Message-ID: <CAHk-=whxpKc_zOiJ9n-MA9s0wxvU9vRST+iuNYGkHHB6ux48Rg@mail.gmail.com>
Date:   Mon, 31 Jul 2023 12:07:19 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     David Hildenbrand <david@...hat.com>
Cc:     Peter Xu <peterx@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        liubo <liubo254@...wei.com>,
        Matthew Wilcox <willy@...radead.org>,
        Hugh Dickins <hughd@...gle.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        John Hubbard <jhubbard@...dia.com>,
        Mel Gorman <mgorman@...e.de>
Subject: Re: [PATCH v1 0/4] smaps / mm/gup: fix gup_can_follow_protnone fallout

On Mon, 31 Jul 2023 at 12:00, David Hildenbrand <david@...hat.com> wrote:
>
> So in the "!writable" case, we would always call
> get_user_pages_unlocked() and never honor NUMA faults.

Ok, so kvm doesn't just use the fast version. Oh well. It was an idea..

         Linus