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Message-Id: <20090904101143.5220.61131.sendpatchset@localhost.localdomain>
Date: Fri, 4 Sep 2009 06:09:16 -0400
From: Amerigo Wang <amwang@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: tony.luck@...el.com, linux-ia64@...r.kernel.org,
Neil Horman <nhorman@...hat.com>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>,
Amerigo Wang <amwang@...hat.com>,
Michael Ellerman <michael@...erman.id.au>,
"M. Mohan Kumar" <mohan@...ibm.com>, akpm@...ux-foundation.org,
bernhard.walle@....de, Fenghua Yu <fenghua.yu@...el.com>,
kamezawa.hiroyu@...fujitsu.com,
Anton Vorontsov <avorontsov@...mvista.com>
Subject: [Patch 5/8] powerpc: add CONFIG_KEXEC_AUTO_RESERVE
Introduce a new config option KEXEC_AUTO_RESERVE for powerpc.
Signed-off-by: WANG Cong <amwang@...hat.com>
Acked-by: Neil Horman <nhorman@...driver.com>
---
Index: linux-2.6/arch/powerpc/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/Kconfig
+++ linux-2.6/arch/powerpc/Kconfig
@@ -346,6 +346,17 @@ config KEXEC
support. As of this writing the exact hardware interface is
strongly in flux, so no good recommendation can be made.
+config KEXEC_AUTO_RESERVE
+ bool "automatically reserve memory for kexec kernel"
+ depends on KEXEC
+ default y
+ ---help---
+ Automatically reserve memory for a kexec kernel, so that you don't
+ need to specify numbers for the "crashkernel=X@Y" boot option,
+ instead you can use "crashkernel=auto". To make this work, you need
+ to have more than 2G memory. On PPC, 128M or 256M is reserved, on
+ PPC64 1/32 of your physical memory, but it will not exceed 4G.
+
config CRASH_DUMP
bool "Build a kdump crash kernel"
depends on PPC64 || 6xx
--
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