diff options
| author | Feng Tang <feng.tang@linux.alibaba.com> | 2025-07-03 10:10:02 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-07-19 19:08:24 -0700 |
| commit | d747755917bf8ae08f490c3fe7d8e321afab8127 (patch) | |
| tree | 1cc57b216777b97d773badbf68488f83c934b439 /Documentation/admin-guide/sysctl | |
| parent | b76e89e50fc3693b7b8a443ed906320d8ccb93fd (diff) | |
panic: add 'panic_sys_info' sysctl to take human readable string parameter
Bitmap definition for 'panic_print' is hard to remember and decode. Add
'panic_sys_info='sysctl to take human readable string like
"tasks,mem,timers,locks,ftrace,..." and translate it into bitmap.
The detailed mapping is:
SYS_INFO_TASKS "tasks"
SYS_INFO_MEM "mem"
SYS_INFO_TIMERS "timers"
SYS_INFO_LOCKS "locks"
SYS_INFO_FTRACE "ftrace"
SYS_INFO_ALL_CPU_BT "all_bt"
SYS_INFO_BLOCKED_TASKS "blocked_tasks"
[nathan@kernel.org: add __maybe_unused to sys_info_avail]
Link: https://lkml.kernel.org/r/20250708-fix-clang-sys_info_avail-warning-v1-1-60d239eacd64@kernel.org
Link: https://lkml.kernel.org/r/20250703021004.42328-4-feng.tang@linux.alibaba.com
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Suggested-by: Petr Mladek <pmladek@suse.com>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation/admin-guide/sysctl')
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index 0d08b7a2db2d..cccb06d1a6bf 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -899,6 +899,24 @@ So for example to print tasks and memory info on panic, user can:: echo 3 > /proc/sys/kernel/panic_print +panic_sys_info +============== + +A comma separated list of extra information to be dumped on panic, +for example, "tasks,mem,timers,...". It is a human readable alternative +to 'panic_print'. Possible values are: + +============= =================================================== +tasks print all tasks info +mem print system memory info +timer print timers info +lock print locks info if CONFIG_LOCKDEP is on +ftrace print ftrace buffer +all_bt print all CPUs backtrace (if available in the arch) +blocked_tasks print only tasks in uninterruptible (blocked) state +============= =================================================== + + panic_on_rcu_stall ================== |