进程控制块(PCB)结构

include/linux/sched.h
struct task_struct {
 volatile long state;
 struct thread_info *thread_info;
 atomic_t usage;
unsigned long flags; 
unsigned long ptrace;

 int lock_depth;

 int prio, static_prio;
 struct list_head run_list;
 prio_array_t *array;

 unsigned long sleep_avg;
 long interactive_credit;
 unsigned long long timestamp;
 int activated;

 unsigned long policy;
 cpumask_t cpus_allowed;
 unsigned int time_slice, first_time_slice;

struct list_head tasks;
 struct list_head ptrace_children;
 struct list_head ptrace_list;

 struct mm_struct *mm, *active_mm;
...
 struct linux_binfmt *binfmt;
 int exit_code, exit_signal;
 int pdeath_signal;
...
 pid_t pid;
 pid_t tgid;
...
struct task_struct *real_parent;
struct task_struct *parent;
struct list_head children;
 struct list_head sibling;
 struct task_struct *group_leader;
...
 struct pid_link pids[PIDTYPE_MAX];

 wait_queue_head_t wait_chldexit;
 struct completion *vfork_done;
 int __user *set_child_tid;
 int __user *clear_child_tid;

 unsigned long rt_priority;
 unsigned long it_real_value, it_prof_value, it_virt_value;
 unsigned long it_real_incr, it_prof_incr, it_virt_incr;
 struct timer_list real_timer;
 unsigned long utime, stime, cutime, cstime;
 unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
 u64 start_time;
...
 uid_t uid,euid,suid,fsuid;
  gid_t gid,egid,sgid,fsgid;
 struct group_info *group_info;
 kernel_cap_t cap_effective, cap_inheritable, cap_permitted;
 int keep_capabilities:1;
 struct user_struct *user;
...
 struct rlimit rlim[RLIM_NLIMITS];
 unsigned short used_math;
 char comm[16];
...
 int link_count, total_link_count;
...
 struct fs_struct *fs;
...
 struct files_struct *files;
...
 unsigned long ptrace_message;
 siginfo_t *last_siginfo;
...
 };