linux-kernel - Re: [PATCH 1/5] mm: Introduce mm_struct.has

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Message-ID: <20200927062337.GE2280698@unreal>
Date:   Sun, 27 Sep 2020 09:23:37 +0300
From:   Leon Romanovsky <leonro@...dia.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Jason Gunthorpe <jgg@...pe.ca>, Peter Xu <peterx@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Linux-MM <linux-mm@...ck.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Jan Kara <jack@...e.cz>, Michal Hocko <mhocko@...e.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Kirill Shutemov <kirill@...temov.name>,
        Hugh Dickins <hughd@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Oleg Nesterov <oleg@...hat.com>, Jann Horn <jannh@...gle.com>
Subject: Re: [PATCH 1/5] mm: Introduce mm_struct.has_pinned

On Sat, Sep 26, 2020 at 03:28:32PM -0700, Linus Torvalds wrote:
> On Fri, Sep 25, 2020 at 6:15 PM Linus Torvalds
> <torvalds@...ux-foundation.org> wrote:
> >
> > I think that over the weekend I'll do Peter's version but with the
> > "page_mapcount() == 1"  check, because I'm starting to like that
> > better than the mm->has_pinned.
>
> Actually, rafter the first read-through, I feel like I'll just apply
> the series as-is.
>
> But I'll look at it some more, and do another read-through and make
> the final decision tomorrow.
>
> If anybody has any concerns about the v2 patch series from Peter, holler.

We won't be able to test the series till Tuesday due to religious holidays.

Thanks

>
>               Linus