hugetlb_cgroup_migrate

Name:hugetlb_lock will make sure a parallel cgroup rmdir won't happen* when we migrate hugepages

Proto:void hugetlb_cgroup_migrate(struct page *oldhpage, struct page *newhpage)

Type:void

Parameter:

Type	Parameter	Name
struct page *	oldhpage
struct page *	newhpage

419

h = page_hstate(oldhpage)

421

If hugetlb_cgroup_disabled() Then Return

424

VM_BUG_ON_PAGE(!PageHuge() only returns true for hugetlbfs pages, but not for normal or* transparent huge pages. See the PageTransHuge() documentation for more* details., oldhpage)

425

spin_lock( & Protects updates to hugepage_freelists, hugepage_activelist, nr_huge_pages,* free_huge_pages, and surplus_huge_pages.)

426

h_cg = hugetlb_cgroup_from_page(oldhpage)

427

set_hugetlb_cgroup(oldhpage, NULL)

430

set_hugetlb_cgroup(newhpage, h_cg)

431

list_move - delete from one list and add as another's head*@list: the entry to move*@head: the head that will precede our entry

432

spin_unlock( & Protects updates to hugepage_freelists, hugepage_activelist, nr_huge_pages,* free_huge_pages, and surplus_huge_pages.)

433

Return

**Caller**
Name	Describe
move_hugetlb_state

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