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authorVivek Goyal <vgoyal@in.ibm.com>2005-09-13 01:25:47 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-13 08:22:33 -0700
commit64ccd0cfa1e29c2d20b7085ab9611114d327b571 (patch)
tree7fe113a73ee95dc6faad985c4770451e65a29841 /Documentation/kdump
parentf4f9eb0ea14c8c478f0e8137b84a366499335aab (diff)
downloadlinux-linaro-stable-64ccd0cfa1e29c2d20b7085ab9611114d327b571.tar.gz
[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>
Diffstat (limited to 'Documentation/kdump')
-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 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