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| 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 /include/linux/sys_info.h | |
| parent | panic: generalize panic_print's function to show sys info (diff) | |
| download | wireguard-linux-d747755917bf8ae08f490c3fe7d8e321afab8127.tar.xz wireguard-linux-d747755917bf8ae08f490c3fe7d8e321afab8127.zip | |
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 'include/linux/sys_info.h')
| -rw-r--r-- | include/linux/sys_info.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/sys_info.h b/include/linux/sys_info.h index 53b7e27dbf2a..89d77dc4f2ed 100644 --- a/include/linux/sys_info.h +++ b/include/linux/sys_info.h @@ -2,6 +2,8 @@ #ifndef _LINUX_SYS_INFO_H #define _LINUX_SYS_INFO_H +#include <linux/sysctl.h> + /* * SYS_INFO_PANIC_CONSOLE_REPLAY is for panic case only, as it needs special * handling which only fits panic case. @@ -16,5 +18,11 @@ #define SYS_INFO_BLOCKED_TASKS 0x00000080 void sys_info(unsigned long si_mask); +unsigned long sys_info_parse_param(char *str); +#ifdef CONFIG_SYSCTL +int sysctl_sys_info_handler(const struct ctl_table *ro_table, int write, + void *buffer, size_t *lenp, + loff_t *ppos); +#endif #endif /* _LINUX_SYS_INFO_H */ |