hugetlb_cgroup_from_page

Name:hugetlb_cgroup_from_page

Proto:static inline struct hugetlb_cgroup *hugetlb_cgroup_from_page(struct page *page)

Type:struct hugetlb_cgroup

Parameter:

Type	Parameter	Name
struct page *	page

31

VM_BUG_ON_PAGE(!PageHuge(page), page)

33

If compound_order(page) < Minimum page order trackable by hugetlb cgroup.* At least 3 pages are necessary for all the tracking information. Then Return NULL

35

Return *@private: Mapping-private opaque data. * Usually used for buffer_heads if PagePrivate. * Used for swp_entry_t if PageSwapCache. * Indicates order in the buddy system if PageBuddy.

**Caller**
Name	Describe
update_and_free_page
hugetlb_cgroup_move_parent	Should be called with hugetlb_lock held.* Since we are holding hugetlb_lock, pages cannot get moved from* active list or uncharged from the cgroup, So no need to get* page reference and test for page active here. This function* cannot fail.
hugetlb_cgroup_uncharge_page	Should be called with hugetlb_lock held
hugetlb_cgroup_migrate	hugetlb_lock will make sure a parallel cgroup rmdir won't happen* when we migrate hugepages

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion