Function report |
Source Code:mm\huge_memory.c |
Create Date:2022-07-28 16:02:53 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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Name:__split_huge_page_tail
Proto:static void __split_huge_page_tail(struct page *head, int tail, struct lruvec *lruvec, struct list_head *list)
Type:void
Parameter:
Type | Parameter | Name |
---|---|---|
struct page * | head | |
int | tail | |
struct lruvec * | lruvec | |
struct list_head * | list |
2442 | VM_BUG_ON_PAGE(atomic_read( & * If the page can be mapped to userspace, encodes the number * of times this page is referenced by a page table.) != - 1, page_tail) |
2450 | Atomic flags, some possibly * updated asynchronously &= ~Flags checked when a page is prepped for return by the page allocator |
2451 | Atomic flags, some possibly * updated asynchronously |= Atomic flags, some possibly * updated asynchronously & ( 1L << PG_referenced | 1L << PG_swapbacked | 1L << PG_swapcache | 1L << PG_mlocked | 1L << PG_uptodate | 1L << PG_active | 1L << PG_workingset | 1L << PG_locked | 1L << PG_unevictable | 1L << PG_dirty ) |
2464 | VM_BUG_ON_PAGE(tail > 2 && See page-flags.h for PAGE_MAPPING_FLAGS != mm/page_alloc.c ***********, page_tail) |
2470 | smp_wmb() |
2478 | clear_compound_head(page_tail) |
2481 | page_ref_unfreeze(page_tail, 1 + (!PageAnon(head) || PageSwapCache(head))) |
2484 | If page_is_young(head) Then set_page_young(page_tail) |
2486 | If page_is_idle(head) Then set_page_idle(page_tail) |
Name | Describe |
---|---|
__split_huge_page |
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