Process Control blocks and task_struct

http://blog.csdn.net/qq_26768741/article/details/54348586

2. struct Task_struct {
4. volatile long state; /*-1 unrunnable, 0 runnable, >0 stopped */
6. struct Thread_info *thread_info;
8. atomic_t usage;
10. unsigned long flags; / * per process flags, defined below * /
12. unsigned long ptrace;
16. int lock_depth; / * Lock Depth * /
20. int Prio, Static_prio;
22. struct List_head run_list;
24. prio_array_t *array;
28. unsigned long sleep_avg;
30. long Interactive_credit;
32. Unsigned long long timestamp;
34. int activated;
38. unsigned long policy;
40. cpumask_t cpus_allowed;
42. unsigned int time_slice, first_time_slice;
46. struct list_head tasks;
48. struct List_head ptrace_children;
50. struct List_head ptrace_list;
54. struct mm_struct *mm, *active_mm;
58. /* Task State */
60. struct LINUX_BINFMT *binfmt;
62. int Exit_code, exit_signal;
64. int pdeath_signal; / * The signal sent when the parent dies * /
66. /* ??? */  
68. unsigned long personality;
70. int did_exec:1;
72. pid_t pid;
74. pid_t __pgrp; /* Accessed via Process_group () */
76. pid_t tty_old_pgrp;
78. pid_t session;
80. pid_t Tgid;
82. / * Boolean value for session group leader * /
84. int leader;
86. /*  
88. * Pointers to (original) The parent process, youngest child, younger sibling,
90. * older sibling, respectively. (P->father can replaced with
92. * p->parent->pid)
94. */
96. struct task_struct *real_parent; /* Real parent process (when being debugged) */
98. struct task_struct *parent; / * Parent Process * /
100. struct list_head children; / * List of my children * /
102. struct list_head sibling; / * Linkage in my parent ' s children list * /
104. struct task_struct *group_leader; / * Threadgroup leader * /
108. / * pid/pid Hash table linkage. * /
110. struct Pid_link Pids[pidtype_max];
114. wait_queue_head_t Wait_chldexit; /* for WAIT4 () */
116. struct completion *vfork_done; /* for vfork () */
118. int __user *set_child_tid; / * Clone_child_settid * /
120. int __user *clear_child_tid; / * Clone_child_cleartid * /
124. unsigned long rt_priority;
126. Unsigned long it_real_value, It_prof_value, It_virt_value;
128. Unsigned long it_real_incr, IT_PROF_INCR, IT_VIRT_INCR;
130. struct timer_list real_timer;
132. struct List_head posix_timers; / * posix.1b Interval Timers * /
134. Unsigned long utime, stime, Cutime, Cstime;
136. Unsigned long NVCSW, NIVCSW, CNVCSW, CNIVCSW; / * Context Switch counts * /
138. U64 start_time;
140. /* mm fault and swap info:this can arguably be seen as either mm-specific or thread-specific */
142. Unsigned long Min_flt, Maj_flt, Nswap, Cmin_flt, Cmaj_flt, Cnswap;
144. /* Process Credentials */
146. uid_t Uid,euid,suid,fsuid;
148. gid_t Gid,egid,sgid,fsgid;
150. int ngroups;
152. gid_t Groups[ngroups];
154. kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
156. int keep_capabilities:1;
158. struct user_struct *user;
160. /* Limits */
162. struct Rlimit rlim[rlim_nlimits];
164. unsigned short used_math;
166. Char comm[16];
168. /* File System Info */
170. int Link_count, total_link_count;
172. struct tty_struct *tty; / * NULL if no TTY * /
174. /* IPC Stuff */
176. struct Sysv_sem Sysvsem;
178. /* Cpu-specific State of this task */
180. struct thread_struct thread;
182. /* FileSystem information */
184. struct fs_struct *fs;
186. /* Open File Information */
188. struct files_struct *files;
190. /* Namespace */
192. struct namespace *namespace;
194. /* Signal handlers */
196. struct signal_struct *signal;
198. struct sighand_struct *sighand;
202. sigset_t blocked, real_blocked;
204. struct sigpending pending;
208. unsigned long sas_ss_sp;
210. size_t sas_ss_size;
212. Int (*notifier) (void *priv);
214. void *notifier_data;
216. sigset_t *notifier_mask;
220. void *security;
224. /* THREAD Group Tracking */
226. U32 parent_exec_id;
228. U32 self_exec_id;
230. /* Protection of (de-) allocation:mm, files, FS, TTY */
232. spinlock_t Alloc_lock;
234. /* Protection of Proc_dentry:nesting Proc_lock, Dcache_lock, WRITE_LOCK_IRQ (&tasklist_lock); */
236. spinlock_t Proc_lock;
238. /* Context-switch Lock */
240. spinlock_t Switch_lock;
244. /* journalling FileSystem Info */
246. void *journal_info;
250. /* VM State */
252. struct reclaim_state *reclaim_state;
256. struct Dentry *proc_dentry;
258. struct Backing_dev_info *backing_dev_info;
262. struct Io_context *io_context;
266. unsigned long ptrace_message;
268. siginfo_t *last_siginfo;  / * for ptrace use. */  
270. };

Process Control blocks and task_struct