linux-kernel - [Patch 3/8] ia64: add CONFIG_KEXEC_AUTO

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Message-Id: <20090827031837.4534.43300.sendpatchset@localhost.localdomain>
Date:	Wed, 26 Aug 2009 23:16:10 -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>,
	Michael Ellerman <michael@...erman.id.au>,
	Amerigo Wang <amwang@...hat.com>,
	"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 3/8] ia64: add CONFIG_KEXEC_AUTO_RESERVE


Introduce a new config option KEXEC_AUTO_RESERVE for ia64.

Signed-off-by: WANG Cong <amwang@...hat.com>
Acked-by: Neil Horman <nhorman@...driver.com>

---

Index: linux-2.6/arch/ia64/Kconfig
===================================================================
--- linux-2.6.orig/arch/ia64/Kconfig
+++ linux-2.6/arch/ia64/Kconfig
@@ -582,6 +582,20 @@ 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 4G memory.
+
+	  The reserved memory size is different depends on how much memory
+	  you actually have. Please check Documentation/kdump/kdump.txt.
+	  If you doubt, say N.
+
 config CRASH_DUMP
 	  bool "kernel crash dumps"
 	  depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)
--
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