函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\workqueue.c Create Date:2022-07-27 10:27:01
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：process_one_work - process single work*@worker: self*@work: work to process* Process @work

函数原型：static void process_one_work(struct worker *worker, struct work_struct *work)__releases(&pool->lock) __acquires(&pool->lock)

返回类型：void

参数：

类型参数名称
struct worker *worker
struct work_struct *work
2161  pwq等于get_work_pwq(work)
2162  pool等于A: the associated pool
2163  cpu_intensive等于flags按位与WQ_CPU_INTENSIVE
2179  WARN_ON_ONCE(!(X: flags & POOL_DISASSOCIATED) && These macros fold the SMP functionality into a single CPU system() != I: the associated cpu )
2188  collision等于d_worker_executing_work - find worker which is executing a work*@pool: pool of interest*@work: work to find worker for* Find a worker which is executing @work on @pool by searching*@pool->busy_hash which is keyed by the address of @work
2189  如果此条件成立可能性小(为编译器优化)(collision)则
2190  move_linked_works - move linked works to a list*@work: start of series of works to be scheduled*@head: target list to append @work to*@nextp: out parameter for nested worklist walking* Schedule linked works starting from @work to @head
2191  返回
2195  debug_work_deactivate(work)
2196  hash_add - add an object to a hashtable*@hashtable: hashtable to add to*@node: the &struct hlist_node of the object to be added*@key: the key of the object to be added(a workers is either on busy_hash or idle_list, or the manager , & L: while busy , (unsignedlong)work)
2197  L: work being processed 等于work
2198  L: current_work's fn 等于func
2199  L: current_work's pwq 等于pwq
2200  work_color等于get_work_color(work)
2206  strscpy - Copy a C-string into a sized buffer*@dest: Where to copy the string to*@src: Where to copy the string from*@count: Size of destination buffer* Copy the string, or as much of it as fits, into the dest buffer. The
2208  删除链表项并重新初始化
2216  如果此条件成立可能性小(为编译器优化)(cpu_intensive)则worker_set_flags - set worker flags and adjust nr_running accordingly*@worker: self*@flags: flags to set* Set @flags in @worker->flags and adjust nr_running accordingly.* CONTEXT:* spin_lock_irq(pool->lock)
2226  如果Need to wake up a worker? Called from anything but currently* running workers.* Note that, because unbound workers never contribute to nr_running, this* function will always return %true for unbound pools as long as the* worklist isn't empty.则wake_up_worker - wake up an idle worker*@pool: worker pool to wake worker from* Wake up the first idle worker of @pool.* CONTEXT:* spin_lock_irq(pool->lock).
2235  set_work_pool_and_clear_pending(work, I: pool ID )
2237  spin_unlock_irq( & he pool lock )
2239  lock_map_acquire( & lockdep_map)
2240  lock_map_acquire( & lockdep_map)
2262  lockdep_invariant_state(true)
2263  workqueue_execute_start - called immediately before the workqueue callback*@work: pointer to struct work_struct* Allows to track workqueue execution.
2264  L: current_work's fn (work)
2269  workqueue_execute_end - called immediately after the workqueue callback*@work: pointer to struct work_struct* Allows to track workqueue execution.
2270  lock_map_release( & lockdep_map)
2271  lock_map_release( & lockdep_map)
2273  如果此条件成立可能性小(为编译器优化)(Are we running in atomic context? WARNING: this macro cannot* always detect atomic context; in particular, it cannot know about* held spinlocks in non-preemptible kernels. Thus it should not be() || lockdep_depth(当前进程) > 0)则
2274  打印错误信息("BUG: workqueue leaked lock or atomic: %s/0x%08x/%d\n last function: %ps\n", comm, 抢占计数值, task_pid_nr(当前进程), L: current_work's fn )
2278  debug_show_held_locks(当前进程)
2279  dump_stack()
2290  cond_resched()
2292  spin_lock_irq( & he pool lock )
2295  如果此条件成立可能性小(为编译器优化)(cpu_intensive)则worker_clr_flags - clear worker flags and adjust nr_running accordingly*@worker: self*@flags: flags to clear* Clear @flags in @worker->flags and adjust nr_running accordingly.* CONTEXT:* spin_lock_irq(pool->lock)
2299  used by the scheduler to determine a worker's last known identity 等于L: current_work's fn
2302  从哈希表移除对象
2303  L: work being processed = NULL
2304  L: current_work's fn = NULL
2305  L: current_work's pwq = NULL
2306  pwq_dec_nr_in_flight - decrement pwq's nr_in_flight*@pwq: pwq of interest*@color: color of work which left the queue* A work either has completed or is removed from pending queue,* decrement nr_in_flight of its pwq and handle workqueue flushing.* CONTEXT:
调用者
名称描述
process_scheduled_worksprocess_scheduled_works - process scheduled works*@worker: self* Process all scheduled works
worker_thread