[PATCH] More documentation, minor cleanup in kdump.txt

Added clarification on the root device format to be used for second kernel,
as well as specifying initrd if drivers are built as modules.

Signed-off-by: Kishore Sampathkumar <kishore.sampathkumar@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt
index 1f5f7d28c9e6..5f08f9ce6046 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