crash 内核调试工具 ps 指令 显示的进程状态 RU, IN, UN, ZO, ST, TR, DE, SW, WA, PA 什么意思

crash> help ps | grep "the task state"

5. the task state (RU, IN, UN, ZO ,ST, TR, DE, SW, WA, PA, ID, NE)

参考linux-4.19.113内核源码（include/linux/sched.h），有如下定义

/** Task state bitmask. NOTE! These bits are also* encoded in fs/proc/array.c: get_task_state().** We have two separate sets of flags: task->state* is about runnability, while task->exit_state are* about the task exiting. Confusing, but this way* modifying one set can't modify the other one by* mistake.*//* Used in tsk->state: */
#define TASK_RUNNING			0x0000
#define TASK_INTERRUPTIBLE		0x0001
#define TASK_UNINTERRUPTIBLE		0x0002
#define __TASK_STOPPED			0x0004
#define __TASK_TRACED			0x0008
/* Used in tsk->exit_state: */
#define EXIT_DEAD			0x0010
#define EXIT_ZOMBIE			0x0020
#define EXIT_TRACE			(EXIT_ZOMBIE | EXIT_DEAD)
/* Used in tsk->state again: */
#define TASK_PARKED			0x0040
#define TASK_DEAD			0x0080
#define TASK_WAKEKILL			0x0100
#define TASK_WAKING			0x0200
#define TASK_NOLOAD			0x0400
#define TASK_NEW			0x0800
#define TASK_STATE_MAX			0x1000/* Convenience macros for the sake of set_current_state: */
#define TASK_KILLABLE			(TASK_WAKEKILL | TASK_UNINTERRUPTIBLE)
#define TASK_STOPPED			(TASK_WAKEKILL | __TASK_STOPPED)
#define TASK_TRACED			(TASK_WAKEKILL | __TASK_TRACED)#define TASK_IDLE			(TASK_UNINTERRUPTIBLE | TASK_NOLOAD)/* Convenience macros for the sake of wake_up(): */
#define TASK_NORMAL			(TASK_INTERRUPTIBLE | TASK_UNINTERRUPTIBLE)/* get_task_state(): */
#define TASK_REPORT			(TASK_RUNNING | TASK_INTERRUPTIBLE | \TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \__TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE | \TASK_PARKED)

即：

RU	TASK_RUNNING	可执行状态或运行状态
IN	TASK_INTERRUPTIBLE	可中断阻塞状态
UN	TASK_UNINTERRUPTIBLE	不可中断阻塞状态
ZO	EXIT_ZOMBIE	僵死状态
ST	TASK_STOPPED	暂停状态
TR	TASK_TRACED	跟踪状态
DE	TASK_DEAD (EXIT_DEAD ?)	退出状态
SW	?
WA	TASK_WAKEKILL? TASK_WAKING?
PA	TASK_PARKED	?
ID	TASK_IDLE	空闲？
NE	TASK_NEW	新建？

参考： ​​​​​​​​​​​​​​Linux进程状态及其相互转换_linux进程状态转换图_刘鹏加油呀的博客-CSDN博客