diff options
| author | Feng Tang <feng.tang@linux.alibaba.com> | 2025-11-13 19:10:37 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-11-20 14:03:43 -0800 |
| commit | 8b2b9b4f6f4f7a61b7e323479ed7d9faa21d6287 (patch) | |
| tree | c2ca9a746788cadfe79a6ad202546e2daf938c45 /lib/netdev-notifier-error-inject.c | |
| parent | 5f264c00b669b934300dff506d0aa9f6f8f8c53e (diff) | |
hung_task: add hung_task_sys_info sysctl to dump sys info on task-hung
When task-hung happens, developers may need different kinds of system
information (call-stacks, memory info, locks, etc.) to help debugging.
Add 'hung_task_sys_info' sysctl knob to take human readable string like
"tasks,mem,timers,locks,ftrace,...", and when task-hung happens, all
requested information will be dumped. (refer kernel/sys_info.c for more
details).
Meanwhile, the newly introduced sys_info() call is used to unify some
existing info-dumping knobs.
[feng.tang@linux.alibaba.com: maintain consistecy established behavior, per Lance and Petr]
Link: https://lkml.kernel.org/r/aRncJo1mA5Zk77Hr@U-2FWC9VHC-2323.local
Link: https://lkml.kernel.org/r/20251113111039.22701-3-feng.tang@linux.alibaba.com
Signed-off-by: Feng Tang <feng.tang@linux.alibaba.com>
Suggested-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'lib/netdev-notifier-error-inject.c')
0 files changed, 0 insertions, 0 deletions