copy_huge_page

Name:copy_huge_page

Proto:static void copy_huge_page(struct page *dst, struct page *src)

Type:void

Parameter:

Type	Parameter	Name
struct page *	dst
struct page *	src

570

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

572

h = page_hstate(src)

573

nr_pages = pages_per_huge_page(h)

575

If Value for the false possibility is greater at compile time(nr_pages > MAX_ORDER_NR_PAGES) Then

576

Gigantic pages are so large that we do not guarantee that page++ pointer* arithmetic will work across the entire page. We need something more* specialized.

577

Return

579

Else

581

BUG_ON(!PageHuge() only returns true for hugetlbfs pages, but not for* normal or transparent huge pages.* PageTransHuge() returns true for both transparent huge and* hugetlbfs pages, but not normal pages. PageTransHuge() can only be)

582

nr_pages = hpage_nr_pages(src)

585

When i < nr_pages cycle

586

587

copy_highpage(dst + i, src + i)

**Caller**
Name	Describe
migrate_page_copy

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