Function report |
Source Code:mm\hugetlb.c |
Create Date:2022-07-28 15:26:23 |
| Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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| Annotation kernel can get tool activity | Download SCCT | Chinese |
Name:Dissolve a given free hugepage into free buddy pages. This function does* nothing for in-use hugepages and non-hugepages.* This function returns values like below:* -EBUSY: failed to dissolved free hugepages or the hugepage is in-use
Proto:int dissolve_free_huge_page(struct page *page)
Type:int
Parameter:
| Type | Parameter | Name |
|---|---|---|
| struct page * | page |
| 1487 | If Not PageHuge() only returns true for hugetlbfs pages, but not for normal or* transparent huge pages. See the PageTransHuge() documentation for more* details. Then Return 0 |
| 1490 | spin_lock( & Protects updates to hugepage_freelists, hugepage_activelist, nr_huge_pages,* free_huge_pages, and surplus_huge_pages.) |
| 1496 | If Not page_count(page) Then |
| 1497 | head = compound_head(page) |
| 1498 | h = page_hstate(head) |
| 1499 | nid = page_to_nid(head) |
| 1500 | If free_huge_pages - resv_huge_pages == 0 Then Go to out |
| 1506 | If PageHWPoison(head) && page != head Then |
| 1507 | SetPageHWPoison(page) |
| 1508 | ClearPageHWPoison(head) |
| 1511 | free_huge_pages-- |
| 1512 | free_huge_pages_node[nid]-- |
| 1513 | max_huge_pages-- |
| 1514 | update_and_free_page(h, head) |
| 1515 | rc = 0 |
| 1517 | out : |
| 1518 | spin_unlock( & Protects updates to hugepage_freelists, hugepage_activelist, nr_huge_pages,* free_huge_pages, and surplus_huge_pages.) |
| 1519 | Return rc |
| Name | Describe |
|---|---|
| dissolve_free_huge_pages | Dissolve free hugepages in a given pfn range |
| me_huge_page | Huge pages. Needs work.* Issues:* - Error on hugepage is contained in hugepage unit (not in raw page unit.)* To narrow down kill region to one page, we need to break up pmd. |
| memory_failure_hugetlb | |
| soft_offline_huge_page | |
| soft_offline_free_page |
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