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 16:46:50
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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函数名称：lock_cluster

函数原型：static inline struct swap_cluster_info *lock_cluster(struct swap_info_struct *si, unsigned long offset)

返回类型：struct swap_cluster_info

参数：

类型参数名称
struct swap_info_struct *si
unsigned longoffset
343  ci等于cluster info. Only for SSD
344  如果ci则
345  ci加等于offset除SWAPFILE_CLUSTER
346  加自旋锁
348  返回:ci
调用者
名称描述
lock_cluster_or_swap_infoDetermine the locking method in use for this device. Return* swap_cluster_info if SSD-style cluster-based locking is in place.
swap_do_scheduled_discardDoing discard actually. After a cluster discard is finished, the cluster* will be added to free cluster list. caller should hold si->lock.
scan_swap_map_try_ssd_clusterTry to get a swap entry from current cpu's swap entry pool (a cluster). This* might involve allocating a new cluster for current CPU too.
scan_swap_map_slots
swap_alloc_cluster
swap_free_cluster
swap_entry_free
page_trans_huge_map_swapcount
add_swap_count_continuationadd_swap_count_continuation - called when a swap count is duplicated* beyond SWAP_MAP_MAX, it allocates a new page and links that to the entry's* page of the original vmalloc'ed swap_map, to hold the continuation count