From: Linus Torvalds <torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
To: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>
Cc: linux-mm <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>,
Cyril Hrubis <chrubis-AlSwsSmVLrQ@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Michel Lespinasse
<walken-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Rik van Riel <riel-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Michael Kerrisk
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: Should mmap MAP_LOCKED fail if mm_poppulate fails?
Date: Tue, 28 Apr 2015 11:38:35 -0700 [thread overview]
Message-ID: <CA+55aFyajquhGhw59qNWKGK4dBV0TPmDD7-1XqPo7DZWvO_hPg@mail.gmail.com> (raw)
In-Reply-To: <20150428183535.GB30918-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
On Tue, Apr 28, 2015 at 11:35 AM, Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org> wrote:
>
> I am still not sure I see the problem here.
Basically, I absolutely hate the notion of us doing something
unsynchronized, when I can see us undoing a mmap that another thread
is doing. It's wrong.
You also didn't react to all the *other* things that were wrong in
that patch-set. The games you play with !fatal_signal_pending() etc
are just crazy.
End result: I absolutely detest the whole thing. I told you what I
consider an acceptable solution instead, that is much simpler and
doesn't have any of the problems of your patchset.
Linus
next prev parent reply other threads:[~2015-04-28 18:38 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-14 9:50 Should mmap MAP_LOCKED fail if mm_poppulate fails? Michal Hocko
[not found] ` <20150114095019.GC4706-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-04-28 12:11 ` Michal Hocko
2015-04-28 12:11 ` [RFC 1/3] mm: mmap make MAP_LOCKED really mlock semantic Michal Hocko
[not found] ` <1430223111-14817-2-git-send-email-mhocko-AlSwsSmVLrQ@public.gmane.org>
2015-04-28 23:10 ` Andrew Morton
2015-04-29 7:52 ` Michal Hocko
2015-04-28 12:11 ` [RFC 2/3] mm: allow munmap related functions to understand gfp_mask Michal Hocko
[not found] ` <1430223111-14817-1-git-send-email-mhocko-AlSwsSmVLrQ@public.gmane.org>
2015-04-28 12:11 ` [RFC 3/3] mm: introduce do_munmap_nofail Michal Hocko
2015-04-28 16:01 ` Should mmap MAP_LOCKED fail if mm_poppulate fails? Linus Torvalds
2015-04-28 16:43 ` Michal Hocko
2015-04-28 16:57 ` Linus Torvalds
[not found] ` <CA+55aFydkG-BgZzry5DrTzueVh9VvEcVJdLV8iOyUphQk=0vpw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-28 18:35 ` Michal Hocko
[not found] ` <20150428183535.GB30918-2MMpYkNvuYDjFM9bn6wA6Q@public.gmane.org>
2015-04-28 18:38 ` Linus Torvalds [this message]
2015-04-28 20:36 ` Michal Hocko
[not found] ` <CA+55aFyajquhGhw59qNWKGK4dBV0TPmDD7-1XqPo7DZWvO_hPg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-29 11:38 ` [RFC PATCH] mmap.2: clarify MAP_LOCKED semantic (was: Re: Should mmap MAP_LOCKED fail if mm_poppulate fails?) Michal Hocko
2015-04-30 0:28 ` David Rientjes
2015-04-30 14:52 ` Michal Hocko
2015-05-06 12:21 ` Michal Hocko
[not found] ` <CA+55aFxzLXx=cC309h_tEc-Gkn_zH4ipR7PsefVcE-97Uj066g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-04-28 20:21 ` Should mmap MAP_LOCKED fail if mm_poppulate fails? Michal Hocko
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