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 16:48:10
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：swap_swapcount

函数原型：static int swap_swapcount(struct swap_info_struct *si, swp_entry_t entry)

返回类型：int

参数：

类型参数名称
struct swap_info_struct *si
swp_entry_tentry
1464  count等于0
1465  offset等于Extract the `offset' field from a swp_entry_t. The swp_entry_t is in* arch-independent format
1468  ci等于Determine the locking method in use for this device. Return* swap_cluster_info if SSD-style cluster-based locking is in place.
1469  count等于swap_count(vmalloc'ed array of usage counts [offset])
1470  unlock_cluster_or_swap_info(si, ci)
1471  返回:count
调用者
名称描述
__swp_swapcountHow many references to @entry 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.