page_order

Name:page_order

Proto:static inline int page_order(struct ring_buffer *rb)

Type:int

Parameter:

Type	Parameter	Name
struct ring_buffer *	rb

115

Return 0

**Caller**
Name	Describe
page_is_buddy	This 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_freepages	Move 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_fallback	This 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_pages	This 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_page	Set 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_page	For 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_pageblock	Test 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.

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