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 16:47:34
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：swap_free_cluster

函数原型：static void swap_free_cluster(struct swap_info_struct *si, unsigned long idx)

返回类型：void

参数：

类型参数名称
struct swap_info_struct *si
unsigned longidx
966  offset等于idx乘SWAPFILE_CLUSTER
969  ci等于lock_cluster(si, offset)
970  memset(vmalloc'ed array of usage counts + offset, 0, SWAPFILE_CLUSTER)
971  cluster_set_count_flag(ci, 0, 0)
972  free_cluster(si, idx)
973  unlock_cluster(ci)
974  swap_range_free(si, offset, SWAPFILE_CLUSTER)
调用者
名称描述
put_swap_pageCalled after dropping swapcache to decrease refcnt to swap entries.