Re: [PATCH v5 10/13] mm/madvise: add MADV_COLLAPSE to process_madvise()

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To: "Zach O'Keefe" <zokeefe@xxxxxxxxxx>
Subject: Re: [PATCH v5 10/13] mm/madvise: add MADV_COLLAPSE to process_madvise()
From: David Rientjes <rientjes@xxxxxxxxxx>
Date: Thu, 12 May 2022 13:03:14 -0700 (PDT)
Cc: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>, David Hildenbrand <david@xxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, Pasha Tatashin <pasha.tatashin@xxxxxxxxxx>, Peter Xu <peterx@xxxxxxxxxx>, SeongJae Park <sj@xxxxxxxxxx>, Song Liu <songliubraving@xxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, Yang Shi <shy828301@xxxxxxxxx>, Zi Yan <ziy@xxxxxxxxxx>, linux-mm@xxxxxxxxx, Andrea Arcangeli <aarcange@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Axel Rasmussen <axelrasmussen@xxxxxxxxxx>, Chris Kennelly <ckennelly@xxxxxxxxxx>, Chris Zankel <chris@xxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Hugh Dickins <hughd@xxxxxxxxxx>, Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, Matt Turner <mattst88@xxxxxxxxx>, Max Filippov <jcmvbkbc@xxxxxxxxx>, Miaohe Lin <linmiaohe@xxxxxxxxxx>, Minchan Kim <minchan@xxxxxxxxxx>, Patrick Xia <patrickx@xxxxxxxxxx>, Pavel Begunkov <asml.silence@xxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
In-reply-to: <20220504214437.2850685-11-zokeefe@google.com>
References: <20220504214437.2850685-1-zokeefe@google.com> <20220504214437.2850685-11-zokeefe@google.com>

On Wed, 4 May 2022, Zach O'Keefe wrote:

> Allow MADV_COLLAPSE behavior for process_madvise(2) if caller has
> CAP_SYS_ADMIN or is requesting collapse of it's own memory.
> 
> Signed-off-by: Zach O'Keefe <zokeefe@xxxxxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

References:
- [PATCH v5 00/12] mm: userspace hugepage collapse
  - From: Zach O'Keefe
- [PATCH v5 10/13] mm/madvise: add MADV_COLLAPSE to process_madvise()
  - From: Zach O'Keefe

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