Kernel panic issues are always painful to debug, partially
because it's not easy to get enough information of the
context when panic happens.
And we have ramoops and kdump for that, while this commit
tries to provide a easier way to show the system info by adding
a cmdline parameter, referring some idea from sysrq handler.
The patches have been used by us and did help on solving some nasty
panic cases.
Please help to review, thanks!
- Feng
Changelog:
v3:
- Add one patch to add the "panic_print" into sysctl as
suggested by Steven Rostedt
v2:
- change text "dump/DUMP" to "print/PRINT" which
is more accurate, suggested by Andrew Morton
- add code to print ftrace buffer
Feng Tang (2):
panic: Add options to print system info when panic happens
kernel/sysctl: Add panic_print into sysctl
Documentation/admin-guide/kernel-parameters.txt | 8 +++++++
Documentation/sysctl/kernel.txt | 17 +++++++++++++++
include/linux/kernel.h | 1 +
include/uapi/linux/sysctl.h | 1 +
kernel/panic.c | 28 +++++++++++++++++++++++++
kernel/sysctl.c | 7 +++++++
kernel/sysctl_binary.c | 1 +
7 files changed, 63 insertions(+)
--
2.7.4
