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-rw-r--r--Documentation/kdump/kdump.txt11
1 files changed, 8 insertions, 3 deletions
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 1f5f7d28c9e..5f08f9ce604 100644
--- a/Documentation/kdump/kdump.txt
+++ b/Documentation/kdump/kdump.txt
@@ -66,11 +66,11 @@ SETUP
c) Enable "/proc/vmcore support" (Optional, in Pseudo filesystems).
CONFIG_PROC_VMCORE=y
d) Disable SMP support and build a UP kernel (Until it is fixed).
- CONFIG_SMP=n
+ CONFIG_SMP=n
e) Enable "Local APIC support on uniprocessors".
- CONFIG_X86_UP_APIC=y
+ CONFIG_X86_UP_APIC=y
f) Enable "IO-APIC support on uniprocessors"
- CONFIG_X86_UP_IOAPIC=y
+ CONFIG_X86_UP_IOAPIC=y
Note: i) Options a) and b) depend upon "Configure standard kernel features
(for small systems)" (under General setup).
@@ -95,6 +95,11 @@ SETUP
hence have memory less than 4GB.
iii) Specify "irqpoll" as command line parameter. This reduces driver
initialization failures in second kernel due to shared interrupts.
+ iv) <root-dev> needs to be specified in a format corresponding to
+ the root device name in the output of mount command.
+ v) If you have built the drivers required to mount root file
+ system as modules in <second-kernel>, then, specify
+ --initrd=<initrd-for-second-kernel>.
5) System reboots into the second kernel when a panic occurs. A module can be
written to force the panic or "ALT-SysRq-c" can be used initiate a crash