[Patch 4/8] ia64: add CONFIG_KEXEC_AUTO_RESERVE

Amerigo Wang
2009-08-21T06:54:54Z

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 +582,20 @@ 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)