函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\ksm.c Create Date:2022-07-27 17:14:20
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：ry_to_merge_two_pages - take two identical pages and prepare them* to be merged into one page

函数原型：static struct page *try_to_merge_two_pages(struct rmap_item *rmap_item, struct page *page, struct rmap_item *tree_rmap_item, struct page *tree_page)

返回类型：struct page

参数：

类型参数名称
struct rmap_item *rmap_item
struct page *page
struct rmap_item *tree_rmap_item
struct page *tree_page
1320  err等于ry_to_merge_with_ksm_page - like try_to_merge_two_pages,* but no new kernel page is allocated: kpage must already be a ksm page.* This function returns 0 if the pages were merged, -EFAULT otherwise.
1321  如果非err则
1322  err等于ry_to_merge_with_ksm_page - like try_to_merge_two_pages,* but no new kernel page is allocated: kpage must already be a ksm page.* This function returns 0 if the pages were merged, -EFAULT otherwise.
1328  如果err则break_cow(rmap_item)
1331  返回:如果err则NULL否则page
调用者
名称描述
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