Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\ksm.c Create Date:2022-07-28 15:41:24
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:stable_tree_append - add another rmap_item to the linked list of* rmap_items hanging off a given node of the stable tree, all sharing* the same ksm page.

Proto:static void stable_tree_append(struct rmap_item *rmap_item, struct stable_node *stable_node, bool max_page_sharing_bypass)

Type:void

Parameter:

TypeParameterName
struct rmap_item *rmap_item
struct stable_node *stable_node
boolmax_page_sharing_bypass
2008  BUG_ON(rmap_hlist_len < 0)
2010  rmap_hlist_len++
2011  If Not max_page_sharing_bypass Then WARN_ON_ONCE(rmap_hlist_len > Maximum number of page slots sharing a stable node )
2016  when listed from stable tree = stable_node
2017  + low bits used for flags below |= s listed from the stable tree
2018  hlist_add_head( & hlist, & hlist)
2020  If next Then The number of page slots additionally sharing those nodes ++
2022  Else The number of nodes in the stable tree ++
Caller
NameDescribe
cmp_and_merge_pagemp_and_merge_page - first see if page can be merged into the stable tree;* if not, compare checksum to previous and if it's the same, see if page can* be inserted into the unstable tree, or merged with a page already there and