From: Al Viro <viro@ZenIV.linux.org.uk>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>,
David Miller <davem@davemloft.net>, Ollie Wild <aaw@google.com>,
Rik van Riel <riel@redhat.com>,
viro@ftp.linux.org.uk, linux-arch@vger.kernel.org,
torvalds@linux-foundation.org, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCHSET] mremap/mmap mess
Date: Wed, 9 Dec 2009 13:24:36 +0000 [thread overview]
Message-ID: <20091209132436.GQ14381@ZenIV.linux.org.uk> (raw)
In-Reply-To: <1260361302.5489.372.camel@laptop>
On Wed, Dec 09, 2009 at 01:21:42PM +0100, Peter Zijlstra wrote:
> /me ponders.. doesn't the binfmt engine cruft need the args in place in
> order to execute?
Needs to modify them in case #! and a few other. But that's generally
a matter of "drop argv[0], push several arguments in its place"
> That is, IIRC the problem is that you need to have the argc/env in place
> for the binfmt engine thing, and need to have ran the binfmt engine
> thing before you know the personality.
>
> As to your idea, if that were feasible we could do without the copy and
> simply steal the pages directly from the old mm.
*raised brows*
Old mm may bloody well be still shared, so I'd be vary of trying that -
there's a lot of nasty surprises we could get on that way.
next prev parent reply other threads:[~2009-12-09 13:24 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-05 19:08 [RFC][PATCHSET] mremap/mmap mess Al Viro
2009-12-05 20:44 ` Linus Torvalds
2009-12-05 23:01 ` Al Viro
2009-12-05 23:58 ` Russell King
2009-12-06 17:22 ` Hugh Dickins
2009-12-06 18:00 ` Linus Torvalds
2009-12-07 3:58 ` Al Viro
2009-12-07 18:58 ` Hugh Dickins
2009-12-07 19:30 ` Al Viro
2009-12-07 20:05 ` Hugh Dickins
2009-12-08 6:07 ` Al Viro
2009-12-08 11:42 ` Hugh Dickins
2009-12-08 13:03 ` Hugh Dickins
2009-12-08 21:08 ` David Miller
2009-12-08 22:06 ` Al Viro
2009-12-09 11:43 ` Hugh Dickins
2009-12-09 12:21 ` Peter Zijlstra
2009-12-09 13:12 ` Hugh Dickins
2009-12-09 13:37 ` Peter Zijlstra
2009-12-09 13:24 ` Al Viro [this message]
2009-12-09 13:39 ` Peter Zijlstra
2009-12-09 13:46 ` Al Viro
2009-12-09 14:36 ` Hugh Dickins
2009-12-09 15:12 ` Linus Torvalds
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