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Message-ID: <20091209132436.GQ14381@ZenIV.linux.org.uk> Date: Wed, 9 Dec 2009 13:24:36 +0000 From: Al Viro <viro@...IV.linux.org.uk> To: Peter Zijlstra <peterz@...radead.org> Cc: Hugh Dickins <hugh.dickins@...cali.co.uk>, David Miller <davem@...emloft.net>, Ollie Wild <aaw@...gle.com>, Rik van Riel <riel@...hat.com>, viro@....linux.org.uk, linux-arch@...r.kernel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [RFC][PATCHSET] mremap/mmap mess 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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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