Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes

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To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
From: Peter Xu <peterx@xxxxxxxxxx>
Date: Thu, 24 Sep 2020 11:08:27 -0400
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>, Linux-MM <linux-mm@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Kirill Shutemov <kirill@xxxxxxxxxxxxx>, Jann Horn <jannh@xxxxxxxxxx>, Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Leon Romanovsky <leonro@xxxxxxxxxx>, Jan Kara <jack@xxxxxxx>, John Hubbard <jhubbard@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Andrea Arcangeli <aarcange@xxxxxxxxxx>
In-reply-to: <CAHk-=whBth_SpXYCmYLiZTRadAvncCDAmK_Kw1QNTg-HS23aKA@mail.gmail.com>
References: <20200921211744.24758-1-peterx@redhat.com> <20200921212028.25184-1-peterx@redhat.com> <20200922114839.GC11679@redhat.com> <20200922124013.GD11679@redhat.com> <20200922155842.GG19098@xz-x1> <20200922165216.GF11679@redhat.com> <20200922183438.GL19098@xz-x1> <20200922184359.GI11679@redhat.com> <20200923010332.GP19098@xz-x1> <CAHk-=whBth_SpXYCmYLiZTRadAvncCDAmK_Kw1QNTg-HS23aKA@mail.gmail.com>

On Wed, Sep 23, 2020 at 01:25:52PM -0700, Linus Torvalds wrote:
> IOW, the third patch would be something (COMPLETELY UNTESTED) like the attached.

Thanks.  I'll rework on top.

-- 
Peter Xu

References:
- [PATCH 0/5] mm: Break COW for pinned pages during fork()
  - From: Peter Xu
- [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Peter Xu
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Oleg Nesterov
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Oleg Nesterov
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Peter Xu
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Oleg Nesterov
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Peter Xu
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Oleg Nesterov
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Peter Xu
- Re: [PATCH 4/5] mm: Do early cow for pinned pages during fork() for ptes
  - From: Linus Torvalds

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