函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\io-wq.c Create Date:2022-07-29 10:55:39
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：io_worker_handle_work

函数原型：static void io_worker_handle_work(struct io_worker *worker)__releases(wqe->lock)

返回类型：void

参数：

类型参数名称
struct io_worker *worker
408  struct io_wq_work * work, * old_work = NULL, * put_work = NULL
409  wqe等于wqe
410  wq等于wq
412  循环
413  hash等于负1U
422  work等于io_get_next_work(wqe, & hash)
423  如果work则Worker will start processing some work. Move it to the busy list, if* it's currently on the freelist
425  否则如果非wq_list_empty( & work_list)则flags或等于IO_WQE_FLAG_STALLED
428  spin_unlock_irq( & lock)
429  如果put_work且put_work则put_work(old_work)
431  如果非work则退出
433  :
435  如果signal_pending(当前进程)则Flush all pending signals for this kthread.
438  cond_resched()
440  spin_lock_irq( & lock)
441  cur_work等于work
442  spin_unlock_irq( & lock)
444  如果flags按位与IO_WQ_WORK_CB则func( & work)
447  如果flags按位与IO_WQ_WORK_NEEDS_FILES且files不等于files则
449  Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring* subscriptions and synchronises with wait4(). Also used in procfs. Also* pins the final release of task.io_context. Also protects ->cpuset and* ->cgroup.subsys[]. And ->vfork_done.
450  files等于files
451  task_unlock(当前进程)
453  如果flags按位与IO_WQ_WORK_NEEDS_USER且非mm且mm则
455  如果mmget_not_zero(mm)则
459  否则
460  flags或等于IO_WQ_WORK_CANCEL
463  如果非creds则creds等于verride_creds - Override the current process's subjective credentials*@new: The credentials to be assigned* Install a set of temporary override subjective credentials on the current* process, returning the old set for later reversion.
465  如果fs且fs不等于fs则fs等于fs
467  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则flags或等于IO_WQ_WORK_CANCEL
469  如果mm则flags或等于IO_WQ_WORK_HAS_MM
472  如果get_work且非flags按位与IO_WQ_WORK_INTERNAL的值则
473  put_work等于work
474  get_work(work)
477  old_work等于work
478  func( & work)
480  spin_lock_irq( & lock)
481  cur_work = NULL
482  spin_unlock_irq( & lock)
484  spin_lock_irq( & lock)
486  如果hash不等于负1U则
487  hash_map与等于BIT_ULL(hash)的反
488  flags与等于IO_WQE_FLAG_STALLED的反
490  如果work且work不等于old_work则
491  spin_unlock_irq( & lock)
493  如果put_work且put_work则
494  put_work(put_work)
495  put_work = NULL
499  hash等于负1U
500  转到:next
502  当1循环
调用者
名称描述
io_wqe_worker