[Patch 5/7] powerpc: add CONFIG_KEXEC_AUTO_RESERVE

Amerigo Wang
2009-08-05T11:20:45Z

Introduce a new config option KEXEC_AUTO_RESERVE for powerpc.

Signed-off-by: WANG Cong <amwang@redhat.com>

---
Index: linux-2.6/arch/powerpc/Kconfig
===================================================================
--- linux-2.6.orig/arch/powerpc/Kconfig
+++ linux-2.6/arch/powerpc/Kconfig
@@ -346,6 +346,16 @@ 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 PPC, 256M is reserved and only when you have memory > 4G.
+
config CRASH_DUMP
bool "Build a kdump crash kernel"
depends on PPC64 || 6xx