PageKsm

函数名称：A KSM page is one of those write-protected "shared pages" or "merged pages"* which KSM maps into multiple mms, wherever identical anonymous page content* is found in VM_MERGEABLE vmas. It's a PageAnon page, pointing not to any

函数原型：static __always_inline int PageKsm(struct page *page)

返回类型：int

参数：

类型	参数	名称
struct page *	page

**调用者**
名称	描述
__dump_page
do_wp_page	This routine handles present pages, when users try to write* to a shared page. It is done by copying the page to a new address* and decrementing the shared-page counter for the old page.* Note that this routine assumes that the protection checks have been
change_pte_range
page_referenced	page_referenced - test if the page was referenced@page: the page to test@is_locked: caller holds lock on the page@memcg: target memory cgroup@vm_flags: collect encountered vma->vm_flags who actually referenced the page* Quick test_and_clear_referenced
do_page_add_anon_rmap	Special version of the above for do_swap_page, which often runs* into pages that are exclusively owned by the current process.* Everybody else should continue to use page_add_anon_rmap above.
try_to_unmap	ry_to_unmap - try to remove all page table mappings to a page@page: the page to get unmapped@flags: action and flags* Tries to remove all the page table entries which are mapping this* page, used in the pageout path. Caller must hold the page lock.
rmap_walk
rmap_walk_locked	Like rmap_walk, but caller holds relevant rmap lock
reuse_swap_page	We can write to an anon page without COW if there are no other references* to it. And as a side-effect, free up its swap: because the old content* on disk will never be read, and seeking back there to write new content
break_ksm	We use break_ksm to break COW on a ksm page: it's a stripped down* if (get_user_pages(addr, 1, 1, 1, &page, NULL) == 1)* put_page(page);* but taking great care only to touch a ksm page, in a VM_MERGEABLE vma,
page_stable_node
ksm_might_need_to_copy
rmap_walk_ksm
remove_migration_pte	Restore a potential migration pte to a working pte entry
__unmap_and_move
hwpoison_user_mappings	Do all that is necessary to remove user space mappings. Unmap* the pages and send SIGBUS to the processes if the data was dirty.
page_idle_clear_pte_refs

函数逻辑报告