函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:block\blk-iocost.c Create Date:2022-07-27 19:23:18
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Update @iocg's `active` and `inuse` to @active and @inuse, update level* weight sums and propagate upwards accordingly.

函数原型：static void __propagate_active_weight(struct ioc_gq *iocg, unsigned int active, unsigned int inuse)

返回类型：void

参数：

类型参数名称
struct ioc_gq *iocg
unsigned intactive
unsigned intinuse
896  ioc等于ioc
899  lockdep_assert_held( & lock)
901  inuse等于两数取小(active, inuse)
903  以lvl大于等于0循环
904  parent等于ancestors[lvl]
905  child等于ancestors[lvl + 1]
906  parent_active等于0, parent_inuse等于0
909  see __propagate_active_weight() and current_hweight() for details 加等于active减active
910  child_inuse_sum加等于inuse减inuse
912  active等于active
913  inuse等于inuse
920  如果 see __propagate_active_weight() and current_hweight() for details 则
921  parent_active等于weight
922  parent_inuse等于DIV64_U64_ROUND_UP(parent_active * child_inuse_sum, see __propagate_active_weight() and current_hweight() for details )
928  如果parent_active恒等于active且parent_inuse恒等于inuse则退出
932  active等于parent_active
933  inuse等于parent_inuse
936  weights_updated = true
调用者
名称描述
propagate_active_weight
ioc_timer_fn