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Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK

From Florian Weimer <fweimer@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK
Date 2017-08-11 16:20 +0200
Message-ID <udiX7-4AP-17@gated-at.bofh.it> (permalink)
References (6 earlier) <ucXJ0-7xc-9@gated-at.bofh.it> <ucZ86-5c-17@gated-at.bofh.it> <ucZ86-5c-15@gated-at.bofh.it> <ud3Y5-3tF-5@gated-at.bofh.it> <udiNr-4xf-9@gated-at.bofh.it>
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On 08/11/2017 04:06 PM, Michal Hocko wrote:

> I am sorry to look too insisting here (I have still hard time to reconcile
> myself with the madvise (ab)use) but if we in fact want minherit like
> interface why don't we simply add minherit and make the code which wants
> to use that interface easier to port? Is the only reason that hooking
> into madvise is less code? If yes is that a sufficient reason to justify
> the (ab)use of madvise? If there is a general consensus on that part I
> will shut up and won't object anymore. Arguably MADV_DONTFORK would fit
> into minherit API better as well.

It does, OpenBSD calls it MAP_INHERIT_NONE.

Could you implement MAP_INHERIT_COPY and MAP_INHERIT_SHARE as well?  Or
is changing from MAP_SHARED to MAP_PRIVATE and back impossible?

Thanks,
Florian

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Thread

[PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK riel@redhat.com - 2017-08-06 16:10 +0200
  Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-07 15:30 +0200
    Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-07 15:50 +0200
      Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-07 16:20 +0200
        Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 15:10 +0200
      Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Rik van Riel <riel@redhat.com> - 2017-08-07 17:10 +0200
        Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-09 12:10 +0200
          Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Rik van Riel <riel@redhat.com> - 2017-08-09 14:40 +0200
          Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-09 14:50 +0200
        Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 15:10 +0200
          Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Colm MacCárthaigh <colm@allcosts.net> - 2017-08-10 15:30 +0200
            Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 17:40 +0200
              Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 19:10 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Colm MacCárthaigh <colm@allcosts.net> - 2017-08-11 00:20 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-11 16:10 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-11 16:20 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-11 16:30 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-11 17:30 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-11 17:40 +0200
      Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Colm MacCárthaigh <colm@allcosts.net> - 2017-08-07 18:10 +0200
      Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 15:30 +0200
        Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 16:20 +0200
  Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Mike Kravetz <mike.kravetz@oracle.com> - 2017-08-07 20:30 +0200
    Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-08 12:00 +0200
      Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Rik van Riel <riel@redhat.com> - 2017-08-08 15:20 +0200
        Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Mike Kravetz <mike.kravetz@oracle.com> - 2017-08-08 17:30 +0200
          Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Florian Weimer <fweimer@redhat.com> - 2017-08-08 17:30 +0200
          Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Rik van Riel <riel@redhat.com> - 2017-08-08 17:50 +0200
            Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Colm MacCárthaigh <colm@allcosts.net> - 2017-08-08 18:50 +0200
            Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Matthew Wilcox <willy@infradead.org> - 2017-08-08 19:00 +0200
              Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Rik van Riel <riel@redhat.com> - 2017-08-08 20:50 +0200
                Re: [PATCH v2 0/2] mm,fork,security: introduce MADV_WIPEONFORK Michal Hocko <mhocko@kernel.org> - 2017-08-10 17:40 +0200

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