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authorVivek Goyal <vgoyal@in.ibm.com>2005-09-13 04:25:47 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-13 11:22:33 -0400
commit64ccd0cfa1e29c2d20b7085ab9611114d327b571 (patch)
tree7fe113a73ee95dc6faad985c4770451e65a29841 /Documentation/kdump
parentf4f9eb0ea14c8c478f0e8137b84a366499335aab (diff)
[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
66 c) Enable "/proc/vmcore support" (Optional, in Pseudo filesystems). 66 c) Enable "/proc/vmcore support" (Optional, in Pseudo filesystems).
67 CONFIG_PROC_VMCORE=y 67 CONFIG_PROC_VMCORE=y
68 d) Disable SMP support and build a UP kernel (Until it is fixed). 68 d) Disable SMP support and build a UP kernel (Until it is fixed).
69 CONFIG_SMP=n 69 CONFIG_SMP=n
70 e) Enable "Local APIC support on uniprocessors". 70 e) Enable "Local APIC support on uniprocessors".
71 CONFIG_X86_UP_APIC=y 71 CONFIG_X86_UP_APIC=y
72 f) Enable "IO-APIC support on uniprocessors" 72 f) Enable "IO-APIC support on uniprocessors"
73 CONFIG_X86_UP_IOAPIC=y 73 CONFIG_X86_UP_IOAPIC=y
74 74
75 Note: i) Options a) and b) depend upon "Configure standard kernel features 75 Note: i) Options a) and b) depend upon "Configure standard kernel features
76 (for small systems)" (under General setup). 76 (for small systems)" (under General setup).
@@ -95,6 +95,11 @@ SETUP
95 hence have memory less than 4GB. 95 hence have memory less than 4GB.
96 iii) Specify "irqpoll" as command line parameter. This reduces driver 96 iii) Specify "irqpoll" as command line parameter. This reduces driver
97 initialization failures in second kernel due to shared interrupts. 97 initialization failures in second kernel due to shared interrupts.
98 iv) <root-dev> needs to be specified in a format corresponding to
99 the root device name in the output of mount command.
100 v) If you have built the drivers required to mount root file
101 system as modules in <second-kernel>, then, specify
102 --initrd=<initrd-for-second-kernel>.
98 103
995) System reboots into the second kernel when a panic occurs. A module can be 1045) System reboots into the second kernel when a panic occurs. A module can be
100 written to force the panic or "ALT-SysRq-c" can be used initiate a crash 105 written to force the panic or "ALT-SysRq-c" can be used initiate a crash