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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 <>
Acked-by: Neil Horman <>


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.

+ 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.
bool "kernel crash dumps"
depends on IA64_MCA_RECOVERY && !IA64_HP_SIM && (!SMP || HOTPLUG_CPU)

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