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authorAndi Kleen <ak@suse.de>2006-09-26 10:52:35 +0200
committerAndi Kleen <andi@basil.nowhere.org>2006-09-26 10:52:35 +0200
commit1edf777803bdd2aeeb04cf44508fd9b88737fba8 (patch)
tree5b583b439d5fbee22e2c391be9c6c172e34ae222 /arch/x86_64/Kconfig
parentcbf9b4bb76c9ce53b7fdde0dffcd000951b5f0d4 (diff)
downloadlinux-linaro-stable-1edf777803bdd2aeeb04cf44508fd9b88737fba8.tar.gz
[PATCH] i386/x86-64: Improve Kconfig description of CRASH_DUMP
Improve Kconfig description of CONFIG_CRASH_DUMP. Previously it was too brief to be useful. Cc: vgoyal@in.ibm.com Cc: ebiederm@xmission.com Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/x86_64/Kconfig')
-rw-r--r--arch/x86_64/Kconfig9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index 6cd4878625f1..927b392a4aa0 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -488,7 +488,14 @@ config CRASH_DUMP
bool "kernel crash dumps (EXPERIMENTAL)"
depends on EXPERIMENTAL
help
- Generate crash dump after being started by kexec.
+ Generate crash dump after being started by kexec.
+ This should be normally only set in special crash dump kernels
+ which are loaded in the main kernel with kexec-tools into
+ a specially reserved region and then later executed after
+ a crash by kdump/kexec. The crash dump kernel must be compiled
+ to a memory address not used by the main kernel or BIOS using
+ PHYSICAL_START.
+ For more details see Documentation/kdump/kdump.txt
config PHYSICAL_START
hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)