函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swapfile.c Create Date:2022-07-27 16:46:34
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：swap_count

函数原型：static inline unsigned char swap_count(unsigned char ent)

返回类型：unsigned char

参数：

类型参数名称
unsigned charent
113  返回:ent按位与Flag page is cached, in first swap_map 的反
调用者
名称描述
page_swapcountHow many references to page are currently swapped out?* This does not give an exact answer when swap count is continued,* but does include the high COUNT_CONTINUED flag to allow for that.
__swap_count
swap_swapcount
swp_swapcountHow many references to @entry are currently swapped out?* This considers COUNT_CONTINUED so it returns exact answer.
swap_page_trans_huge_swapped
page_trans_huge_map_swapcount
find_next_to_unuseScan swap_map (or frontswap_map if frontswap parameter is true)* from current position to next entry still in use. Return 0* if there are no inuse entries after prev till end of the map.
__swap_duplicateVerify that a swap entry is valid and increment its swap map count.* Returns error code in following case.* - success -> 0* - swp_entry is invalid -> EINVAL* - swp_entry is migration entry -> EINVAL