diff options
Diffstat (limited to 'Documentation/kdump')
-rw-r--r-- | Documentation/kdump/kdump.txt | 11 |
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 | ||
99 | 5) System reboots into the second kernel when a panic occurs. A module can be | 104 | 5) 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 |