Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\khugepaged.c Create Date:2022-07-28 16:06:24
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:__collapse_huge_page_copy

Proto:static void __collapse_huge_page_copy(pte_t *pte, struct page *page, struct vm_area_struct *vma, unsigned long address, spinlock_t *ptl)

Type:void

Parameter:

TypeParameterName
pte_t *pte
struct page *page
struct vm_area_struct *vma
unsigned longaddress
spinlock_t *ptl
652  When _pte < pte + HPAGE_PMD_NR cycle
654  pteval = _pte
657  If pte_none(pteval) || is_zero_pfn(pte_pfn(pteval)) Then
658  when CONFIG_HIGHMEM is not set these will be plain clear/copy_page
659  add_mm_counter(The address space we belong to. , MM_ANONPAGES, 1)
660  If is_zero_pfn(pte_pfn(pteval)) Then
672  Else
673  src_page = pte_page(pteval)
674  copy_user_highpage(page, src_page, address, vma)
675  VM_BUG_ON_PAGE(page_mapcount(src_page) != 1, src_page)
676  release_pte_page(src_page)
682  spin_lock(ptl)
687  pte_clear(The address space we belong to. , address, _pte)
688  page_remove_rmap - take down pte mapping from a page*@page: page to remove mapping from*@compound: uncharge the page as compound or small page* The caller needs to hold the pte lock.
689  spin_unlock(ptl)
690  ly sparc can not include linux/pagemap.h in this file* so leave put_page and release_pages undeclared... (src_page)
Caller
NameDescribe
collapse_huge_page