isolate_huge_page

Name:isolate_huge_page

Proto:bool isolate_huge_page(struct page *page, struct list_head *list)

Type:bool

Parameter:

Type	Parameter	Name
struct page *	page
struct list_head *	list

5019

bool ret = true

5021

VM_BUG_ON_PAGE(!PageHead(page), page)

5022

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

5023

If Not Test to determine whether the hugepage is "active/in-use" (i.e. being linked* to hstate->hugepage_activelist.)* This function can be called for tail pages, but never returns true for them. || Not Try to grab a ref unless the page has a refcount of zero, return false if* that is the case.* This can be called when MMU is off so it must not access* any of the virtual mappings. Then

5024

ret = false

5025

Go to unlock

5027

clear_page_huge_active(page)

5028

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

5029

5030

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

5031

Return ret

**Caller**
Name	Describe
queue_pages_hugetlb
add_page_for_migration	Resolves the given address to a struct page, isolates it from the LRU and* puts it to the given pagelist
soft_offline_huge_page

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