From b76e89e50fc3693b7b8a443ed906320d8ccb93fd Mon Sep 17 00:00:00 2001 From: Feng Tang Date: Thu, 3 Jul 2025 10:10:01 +0800 Subject: panic: generalize panic_print's function to show sys info 'panic_print' was introduced to help debugging kernel panic by dumping different kinds of system information like tasks' call stack, memory, ftrace buffer, etc. Actually this function could also be used to help debugging other cases like task-hung, soft/hard lockup, etc. where user may need the snapshot of system info at that time. Extract system info dump function related code from panic.c to separate file sys_info.[ch], for wider usage by other kernel parts for debugging. Also modify the macro names about singulars/plurals. Link: https://lkml.kernel.org/r/20250703021004.42328-3-feng.tang@linux.alibaba.com Signed-off-by: Feng Tang Suggested-by: Petr Mladek Cc: John Ogness Cc: Jonathan Corbet Cc: Lance Yang Cc: "Paul E . McKenney" Cc: Steven Rostedt Cc: Nathan Chancellor Signed-off-by: Andrew Morton --- include/linux/sys_info.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 include/linux/sys_info.h (limited to 'include/linux') diff --git a/include/linux/sys_info.h b/include/linux/sys_info.h new file mode 100644 index 000000000000..53b7e27dbf2a --- /dev/null +++ b/include/linux/sys_info.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_SYS_INFO_H +#define _LINUX_SYS_INFO_H + +/* + * SYS_INFO_PANIC_CONSOLE_REPLAY is for panic case only, as it needs special + * handling which only fits panic case. + */ +#define SYS_INFO_TASKS 0x00000001 +#define SYS_INFO_MEM 0x00000002 +#define SYS_INFO_TIMERS 0x00000004 +#define SYS_INFO_LOCKS 0x00000008 +#define SYS_INFO_FTRACE 0x00000010 +#define SYS_INFO_PANIC_CONSOLE_REPLAY 0x00000020 +#define SYS_INFO_ALL_CPU_BT 0x00000040 +#define SYS_INFO_BLOCKED_TASKS 0x00000080 + +void sys_info(unsigned long si_mask); + +#endif /* _LINUX_SYS_INFO_H */ -- cgit v1.2.3