Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\swapfile.c Create Date:2022-07-28 15:16:29
Last Modify:2020-03-17 22:19:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:lock_cluster

Proto:static inline struct swap_cluster_info *lock_cluster(struct swap_info_struct *si, unsigned long offset)

Type:struct swap_cluster_info

Parameter:

TypeParameterName
struct swap_info_struct *si
unsigned longoffset
343  ci = cluster info. Only for SSD
344  If ci Then
345  ci += offset / SWAPFILE_CLUSTER
346  spin_lock( & Protect swap_cluster_info fields* and swap_info_struct->swap_map* elements correspond to the swap* cluster)
348  Return ci
Caller
NameDescribe
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