Linuxプロセス制御ブロックのデータ構造task_structの主な情報

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struct task_struct 
{
 //            ,        
    volatile long state;  
 //Flage     ,   fork()   
 unsigned long flags;  
 //            
 int sigpending;   
 //      ,                     
 mm_segment_t addr_limit; //0-0xBFFFFFFF for user-thead  
      //0-0xFFFFFFFF for kernel-thread
                        
 //    ,             ,  0,            ,     
 volatile long need_resched;
 //   
 int lock_depth;  
 //        
 long nice;       
 //       ,   ,    :SCHED_FIFO,SCHED_RR,     :SCHED_OTHER
 unsigned long policy;
 //        
 struct mm_struct *mm; 
 
 int processor;
 //       CPU   , cpus_runnable    0,   1              
 unsigned long cpus_runnable, cpus_allowed;
 //         
 struct list_head run_list; 
 //       
 unsigned long sleep_time;  
 //                     ,    init_task
 struct task_struct *next_task, *prev_task;
 struct mm_struct *active_mm;
 struct list_head local_pages;       //            
 unsigned int allocation_order, nr_local_pages;
 struct linux_binfmt *binfmt;  //              
 int exit_code, exit_signal;
 int pdeath_signal;     //               
 unsigned long personality;
 //Linux       UNIX         iBCS2     
 int did_exec:1; 
 pid_t pid;    //     ,        
 pid_t pgrp;   //     ,          
 pid_t tty_old_pgrp;  //            
 pid_t session;  //       
 pid_t tgid;
 int leader;     //           
 struct task_struct *p_opptr,*p_pptr,*p_cptr,*p_ysptr,*p_osptr;
 struct list_head thread_group;   //    
 struct task_struct *pidhash_next; //       HASH 
 struct task_struct **pidhash_pprev;
 wait_queue_head_t wait_chldexit;  // wait4()  
 struct completion *vfork_done;  // vfork()   
 unsigned long rt_priority; //     ,            weight 
 //it_real_value,it_real_incr  REAL   ,   jiffies,     it_real_value
 //             .        ,     SIGALRM  ,    
 //it_real_incr      ,it_prof_value,it_prof_incr  Profile   ,   jiffies。
 //      ,        ,  tick  it_prof_value   ,   0 ,     
 //  SIGPROF,   it_prof_incr    .
 //it_virt_value,it_virt_value  Virtual   ,   jiffies。      ,     
 //   ,  tick  it_virt_value      0 ,       SIGVTALRM,  
 //it_virt_incr    。
 unsigned long it_real_value, it_prof_value, it_virt_value;
 unsigned long it_real_incr, it_prof_incr, it_virt_value;
 struct timer_list real_timer;   //          
 struct tms times;      //         
 unsigned long start_time;  //       
 //       CPU                
 long per_cpu_utime[NR_CPUS], per_cpu_stime[NR_CPUS]; 
 //         :
 //min_flt, maj_flt         (Copy on Write     )     (        
 //        ); nswap            ,            。
 //cmin_flt, cmaj_flt, cnswap                      ,          。
 //             ,                         
 unsigned long min_flt, maj_flt, nswap, cmin_flt, cmaj_flt, cnswap;
 int swappable:1; //                 
 //      
 //uid,gid                    ,         uid,gid
 //euid,egid   uid,gid
 //fsuid,fsgid     uid,gid,   ID      uid,gid  ,       
 //            。
 //suid,sgid   uid,gid
 uid_t uid,euid,suid,fsuid;
 gid_t gid,egid,sgid,fsgid;
 int ngroups; //            
 gid_t groups[NGROUPS]; //        
 //     ,        ,     ,     
 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;   //    FPU
 char comm[16];   //             
 //      
 int link_count, total_link_count;
 //NULL if no tty          ,         ,      
 struct tty_struct *tty;
 unsigned int locks;
 //       
 struct sem_undo *semundo;  //          undo  
 struct sem_queue *semsleeping; //              ,             
 //   CPU  ,   ,         task_struct 
 struct thread_struct thread;
   //      
 struct fs_struct *fs;
   //      
 struct files_struct *files;
   //      
 spinlock_t sigmask_lock;
 struct signal_struct *sig; //      
 sigset_t blocked;  //          ,        
 struct sigpending pending;  //            
 unsigned long sas_ss_sp;
 size_t sas_ss_size;
 int (*notifier)(void *priv);
 void *notifier_data;
 sigset_t *notifier_mask;
 u32 parent_exec_id;
 u32 self_exec_id;
 spinlock_t alloc_lock;
 void *journal_info;
 };