Function report |
Source Code:mm\huge_memory.c |
Create Date:2022-07-28 16:03:02 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:total_mapcount
Proto:int total_mapcount(struct page *page)
Type:int
Parameter:
Type | Parameter | Name |
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struct page * | page |
2584 | VM_BUG_ON_PAGE(PageTail(page), page) |
2589 | compound = compound_mapcount(page) |
2590 | If PageHuge() only returns true for hugetlbfs pages, but not for normal or* transparent huge pages. See the PageTransHuge() documentation for more* details. Then Return compound |
2593 | When i < HPAGE_PMD_NR cycle ret += atomic_read( & * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table.) + 1 |
2596 | If Not PageAnon(page) Then Return ret - compound * HPAGE_PMD_NR |
2600 | Return ret |
Name | Describe |
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page_mapcount_is_zero | |
can_split_huge_page | Racy check whether the huge page can be split |
split_huge_page_to_list | This function splits huge page into normal pages. @page can point to any* subpage of huge page to split. Split doesn't change the position of @page.* Only caller must hold pin on the @page, otherwise split fails with -EBUSY.* The huge page must be locked. |
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