linux-kernel - [patch 0/3] no MAX_ARG

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Message-Id: <20070613100334.635756997@chello.nl>
Date:	Wed, 13 Jun 2007 12:03:34 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-kernel@...r.kernel.org, parisc-linux@...ts.parisc-linux.org,
	linux-mm@...ck.org, linux-arch@...r.kernel.org
Cc:	Ollie Wild <aaw@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...l.org>, Ingo Molnar <mingo@...e.hu>,
	Andi Kleen <ak@...e.de>
Subject: [patch 0/3] no MAX_ARG_PAGES -v2

This patch-set aims at removing the current limit on argv+env space aka.
MAX_ARG_PAGES.

The new mm is created before the binfmt code runs, the stack is placed at the
highest address supported by that architecture.

The argv+env data is then copied from the old mm into the new mm (which is
inactive at that time - this introduces some cache coherency issues).

Then we run the binfmt code, which will compute the final stack address. The
existing stack will be moved downwards (or upwards on PA-RISC) to the desired
place.

This 'trick' heavily relies on the MMU, so for no-MMU archs we stay with the
old approach.

---

Plenty of changes all around, changes listed in the individual patches. We hope
to have addressed all issues raised.

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