函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:include\linux\mm.h Create Date:2022-07-27 06:44:41
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Returns the number of pages in this potentially compound page.

函数原型：static inline unsigned long compound_nr(struct page *page)

返回类型：unsigned long

参数：

类型参数名称
struct page *page
791  返回:1UL左移compound_order(page)位
调用者
名称描述
page_cache_deleteLock ordering:* ->i_mmap_rwsem (truncate_pagecache)* ->private_lock (__free_pte->__set_page_dirty_buffers)* ->swap_lock (exclusive_swap_page, others)* ->i_pages lock* ->i_mutex* ->i_mmap_rwsem (truncate->unmap_mapping_range)* ->mmap_sem* ->i_mmap_rwsem
page_cache_delete_batchpage_cache_delete_batch - delete several pages from page cache*@mapping: the mapping to which pages belong*@pvec: pagevec with pages to delete* The function walks over mapping->i_pages and removes pages passed in @pvec* from the mapping
__remove_mappingSame as remove_mapping, but if the page is removed from the mapping, it* gets returned with a refcount of 0.
shrink_page_listshrink_page_list() returns the number of reclaimed pages
isolate_lru_pagespgdat->lru_lock is heavily contended. Some of the functions that* shrink the lists perform better by taking out a batch of pages* and working on them outside the LRU lock.* For pagecache intensive workloads, this function is the hottest
page_mappedReturn true if this page is mapped into pagetables.* For compound page it returns true if any subpage of compound page is mapped.
isolate_migratepages_blocksolate_migratepages_block() - isolate all migrate-able pages within* a single pageblock*@cc: Compaction control structure.*@low_pfn: The first PFN to isolate*@end_pfn: The one-past-the-last PFN to isolate, within same pageblock
check_and_migrate_cma_pages
try_to_unmap_one@arg: enum ttu_flags will be passed to this argument
has_unmovable_pagesThis function checks whether pageblock includes unmovable pages or not.* If @count is not zero, it is okay to include less @count unmovable pages* PageLRU check without isolation or lru_lock could race so that
add_to_swap_cacheadd_to_swap_cache resembles add_to_page_cache_locked on swapper_space,* but sets SwapCache flag and private instead of mapping and index.
kasan_poison_slab
uncharge_page
hugetlb_cgroup_move_parentShould be called with hugetlb_lock held.* Since we are holding hugetlb_lock, pages cannot get moved from* active list or uncharged from the cgroup, So no need to get* page reference and test for page active here. This function* cannot fail.
find_subpage