函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\zsmalloc.c Create Date:2022-07-27 18:02:08
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：create_page_chain

函数原型：static void create_page_chain(struct size_class *class, struct zspage *zspage, struct page *pages[])

返回类型：void

参数：

类型参数名称
struct size_class *class
struct zspage *zspage
struct page *pages
1032  struct page * prev_page = NULL
1033  nr_pages等于 Number of PAGE_SIZE sized pages to combine to form a 'zspage'
1043  以i小于nr_pages循环
1044  page等于pages[i]
1045  set_page_private(page, (unsignedlong)zspage)
1046  first free object = NULL
1047  如果i恒等于0则
1048  first_page等于page
1049  Private page markings that may be used by the filesystem that owns the page* for its own purposes.* - PG_private and PG_private_2 cause releasepage() and co to be invoked
1050  如果此条件成立可能性小(为编译器优化)(objs_per_zspage == 1 && Number of PAGE_SIZE sized pages to combine to form a 'zspage' == 1)则huge object: pages_per_zspage == 1 && maxobj_per_zspage == 1
1053  否则
1054  first free object 等于page
1056  prev_page等于page
调用者
名称描述
alloc_zspageAllocate a zspage for the given size class