linux-kernel - [PATCH 00/26] Dynamic kernel command-line

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Date:	Mon, 4 Sep 2006 00:50:11 +0300
From:	Alon Bar-Lev <alon.barlev@...il.com>
To:	Alon Bar-Lev <alon.barlev@...il.com>, Andi Kleen <ak@...e.de>,
	Matt Domsch <Matt_Domsch@...l.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	johninsd@....rr.com, davej@...emonkey.org.uk, Riley@...liams.name,
	trini@...nel.crashing.org, davem@...emloft.net, ecd@...inaid.de,
	jj@...site.ms.mff.cuni.cz, anton@...ba.org, wli@...omorphy.com,
	lethal@...ux-sh.org, lethal@...ux-sh.org, rc@....org.uk,
	spyro@....com, spyro@....com, rth@...ddle.net, avr32@...el.com,
	hskinnemoen@...el.com, starvik@...s.com, ralf@...ux-mips.org,
	matthew@....cx, grundler@...isc-linux.org, geert@...ux-m68k.org,
	zippel@...ux-m68k.org, paulus@...ba.org, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, uclinux-v850@....nec.co.jp,
	chris@...kel.net
Subject: [PATCH 00/26] Dynamic kernel command-line

Current implementation stores a static command-line
buffer allocated to COMMAND_LINE_SIZE size. Most
architectures stores two copies of this buffer, one
for future reference and one for parameter parsing.

In order to allow a greater command-line size, these
buffers should be dynamically allocated or marked
as init disposable buffers, so unused memory can be
released.

This patch renames the static saved_command_line
variable into boot_command_line adding __initdata
attribute, so that it can be disposed after
initialization. This rename is required so applications
that use saved_command_line will not be affected
by this change.

It reintroduces saved_command_line as dynamically
allocated buffer to match the data in boot_command_line.

It also mark secondary command-line buffer as __initdata,
and copies it to dynamically allocated static_command_line
buffer components may hold reference to it after
initialization.

This patch is for linux-2.6.18-rc5-mm1 and is divided to
target each architecture. I could not check this in any
architecture so please forgive me if I got it wrong.

Signed-off-by: Alon Bar-Lev <alon.barlev@...il.com>

---

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