函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\bpf_lru_list.c Create Date:2022-07-27 14:28:56
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称:Rotate the active list:* 1. Start from tail* 2. If the node has the ref bit set, it will be rotated* back to the head of active list with the ref bit cleared.* Give this node one more chance to survive in the active list.* 3

函数原型:static void __bpf_lru_list_rotate_active(struct bpf_lru *lru, struct bpf_lru_list *l)

返回类型:void

参数:

类型参数名称
struct bpf_lru *lru
struct bpf_lru_list *l
142  active等于lists[BPF_LRU_LIST_T_ACTIVE]
144  i等于0
146  first_node等于list_first_entry - get the first element from a list*@ptr: the list head to take the element from.*@type: the type of the struct this is embedded in.*@member: the name of the list_head within the struct.* Note, that list is expected to be not empty.(active, structbpf_lru_node, list)
148  如果pf_lru_node helpers Move nodes between or within active and inactive list (like* active to inactive, inactive to active or tail of active back to* the head of active).
150  否则Move nodes between or within active and inactive list (like* active to inactive, inactive to active or tail of active back to* the head of active).
153  如果i先自加恒等于nr_scansnode恒等于first_node退出
调用者
名称描述
__bpf_lru_list_rotate1. Rotate the active list (if needed)* 2. Always rotate the inactive list