set_hugetlb_cgroup

Name:set_hugetlb_cgroup

Proto:static inline int set_hugetlb_cgroup(struct page *page, struct hugetlb_cgroup *h_cg)

Type:int

Parameter:

Type	Parameter	Name
struct page *	page
struct hugetlb_cgroup *	h_cg

41

VM_BUG_ON_PAGE(!PageHuge(page), page)

43

If compound_order(page) < Minimum page order trackable by hugetlb cgroup.* At least 3 pages are necessary for all the tracking information. Then Return -1

45

*@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. = h_cg

46

Return 0

**Caller**
Name	Describe
prep_new_huge_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_commit_charge	Should be called with hugetlb_lock held
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

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