__isolate_lru

函数名称：Attempt to remove the specified page from its LRU. Only take this page* if it is of the appropriate PageActive status. Pages which are being* freed elsewhere are also ignored.* returns 0 on success, -ve errno on failure.

函数原型：int __isolate_lru_page(struct page *page, isolate_mode_t mode)

返回类型：int

参数：

类型	参数	名称
struct page *	page	page to consider
isolate_mode_t	mode	one of the LRU isolation modes defined above

1541

ret等于负EINVAL

1544

如果非PageLRU( page to consider)则返回:ret

1548

如果PageUnevictable( page to consider)且非 one of the LRU isolation modes defined above按位与Isolate unevictable pages 的值则返回:ret

1551

ret等于负EBUSY

1561

如果 one of the LRU isolation modes defined above按位与Isolate for asynchronous migration 则

1563

如果Only test-and-set exist for PG_writeback. The unconditional operators are* risky: they bypass page accounting.则返回:ret

1566

如果PageDirty( page to consider)则

1579

如果非Return true if the page was successfully locked则返回:ret

1582

mapping等于page_mapping( page to consider)

1583

migrate_dirty等于非mapping或migratepage

1584

lock_page - unlock a locked page*@page: the page* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().* Also wakes sleepers in wait_on_page_writeback() because the wakeup* mechanism between PageLocked pages and PageWriteback pages is shared.

1585

如果非migrate_dirty则返回:ret

1590

如果 one of the LRU isolation modes defined above按位与Isolate unmapped pages 且page_mapped( page to consider)则返回:ret

1593

如果此条件成立可能性大(为编译器优化)(Try to grab a ref unless the page has a refcount of zero, return false if* that is the case.* This can be called when MMU is off so it must not access* any of the virtual mappings.)则

1599

ClearPageLRU( page to consider)

1600

ret等于0

1603

返回:ret

**调用者**
名称	描述
isolate_lru_pages	pgdat->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
isolate_migratepages_block	solate_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

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告