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Date: Thu, 6 Aug 2009 02:19:39 -0400
From: Amerigo Wang <amwang@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: tony.luck@intel.com, linux-ia64@vger.kernel.org,
       Neil Horman <nhorman@redhat.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Andi Kleen <andi@firstfloor.org>, Amerigo Wang <amwang@redhat.com>,
       akpm@linux-foundation.org, Fenghua Yu <fenghua.yu@intel.com>,
       Ingo Molnar <mingo@elte.hu>, Anton Vorontsov <avorontsov@ru.mvista.com>
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Subject: [Patch 3/7] ia64: add CONFIG_KEXEC_AUTO_RESERVE
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Introduce a new config option KEXEC_AUTO_RESERVE for ia64.

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

---

Index: linux-2.6/arch/ia64/Kconfig
===================================================================
--- linux-2.6.orig/arch/ia64/Kconfig
+++ linux-2.6/arch/ia64/Kconfig
@@ -582,6 +582,16 @@ 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".
+	  On IA64, 256M is reserved and only when you have memory > 4G.
+
 config CRASH_DUMP
 	  bool "kernel crash dumps"
 	  depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)