函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\events\internal.h Create Date:2022-07-27 14:49:31
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：page_order

函数原型：static inline int page_order(struct ring_buffer *rb)

返回类型：int

参数：

类型参数名称
struct ring_buffer *rb
115  返回:0
调用者
名称描述
page_is_buddyThis function checks whether a page is free && is the buddy* we can coalesce a page and its buddy if* (a) the buddy is not in a hole (check before calling!) &&* (b) the buddy is in the buddy system &&* (c) a page and its buddy have the same order &&
move_freepagesMove the free pages in a range to the free lists of the requested type.* Note that start_page and end_pages are not aligned on a pageblock* boundary. If alignment is required, use move_freepages_block()
steal_suitable_fallbackThis function implements actual steal behaviour. If order is large enough,* we can steal whole pageblock. If not, we first move freepages in this* pageblock to our migratetype and determine how many already-allocated pages
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
is_free_buddy_page
set_hwpoison_free_buddy_pageSet PG_hwpoison flag if a given page is confirmed to be a free page. This* test is performed under the zone lock to prevent a race against page* allocation.
shuffle_valid_pageFor two pages to be swapped in the shuffle, they must be free (on a* 'free_area' lru), have the same order, and have the same migratetype.
unset_migratetype_isolate
__test_page_isolated_in_pageblockTest all pages in the range is free(means isolated) or not.* all pages in [start_pfn...end_pfn) must be in the same zone.* zone->lock must be held before call this.* Returns the last tested pfn.
perf_data_size
__output_copy
__output_skip
__output_copy_user
__perf_output_begin