taskstruct定义..doc

struct task_struct {?????????????????????????? ? volatile long state;?/* -1 unrunnable, 0 runnable, 0 stopped */??????????????????????????? ?void *stack;?????????????????????????????atomic_t usage;?????????????????????????????unsigned int flags;?/* per process flags, defined below */???????????????????????????? unsigned int ptrace; ?????????????????????????????int lock_depth;??/* BKL lock depth */ #ifdef CONFIG_SMP#ifdef __ARCH_WANT_UNLOCKED_CTXSW???????????????????????????? int oncpu;#endif#endif ?????????????????????????????int prio, static_prio, normal_prio;?????????????????????????????struct list_head run_list;???????????????????????????? const struct sched_class *sched_class;???????????????????????????? struct sched_entity se; #ifdef CONFIG_PREEMPT_NOTIFIERS?/* list of struct preempt_notifier: */?????????????????????????????struct hlist_head preempt_notifiers;#endif ???????????????????????????? unsigned short ioprio;?/*? * fpu_counter co ntains the number of consecutive context switches? * that the FPU is used. If this is over a threshold, the lazy fpu? * saving becomes unlazy to save the trap. This is an unsigned char? * so that after 256 times the counter wraps and the behavior turns? * lazy again; this to deal with bursty apps that only use FPU for? * a short time? */???????????????????????????? unsigned char fpu_counter;???????????????????????????? s8 oomkilladj; /* OOM kill score adjustment (bit shift). */#ifdef CONFIG_BLK_DEV_IO_TRACE???????????????????????????? unsigned int btrace_seq;#endif ?????????????????????????????unsigned int policy;???????????????????????????? cpumask_t cpus_allowed;?????????????????????????????unsigned int time_slice; #if defined(CONFIG_SCHEDSTATS) || defined(CONFIG_TASK_DELAY_ACCT)???????????????????????????? struct sched_info sched_info;#endif ???????????????????????????? struct list_head tasks;?/*? * ptrace_list/ptrace_children forms the list of my children? * that were stolen by a ptracer.