clear_page_dirty_for

函数名称：Clear a page's dirty flag, while caring for dirty memory accounting.* Returns true if the page was previously dirty.* This is for preparing to put the page under writeout. We leave the page* tagged as dirty in the xarray so that a concurrent write-for-sync

函数原型：int clear_page_dirty_for_io(struct page *page)

返回类型：int

参数：

类型	参数	名称
struct page *	page

2655

mapping等于page_mapping(page)

2656

ret等于0

2658

BUG_ON(!PageLocked(page))

2660

如果mapping且mapping_cap_account_dirty(mapping)则

2661

inode等于host

2663

struct wb_lock_cookie cookie = {}

2690

如果Cleans the PTEs of shared mappings.* (and since clean PTEs should also be readonly, write protects them too)* returns the number of cleaned PTEs.则Dirty a page

2700

wb等于unlocked_inode_to_wb_begin(inode, & cookie)

2701

如果TestClearPageDirty(page)则

2702

dec_lruvec_page_state(page, NR_FILE_DIRTY)

2703

dec_zone_page_state(page, NR_ZONE_WRITE_PENDING)

2704

dec_wb_stat(wb, WB_RECLAIMABLE)

2705

ret等于1

2707

unlocked_inode_to_wb_end(inode, & cookie)

2708

返回:ret

2710

返回:TestClearPageDirty(page)

**调用者**
名称	描述
write_cache_pages	write_cache_pages - walk the list of dirty pages of the given address space and write all of them
write_one_page	write_one_page - write out a single page and wait on I/O@page: the page to write The page must be locked by the caller and will be unlocked upon return
pageout	pageout is called by shrink_page_list() for each dirty page.* Calls ->writepage().
writeout	Writeback a page to clean the dirty state
iomap_writepage_map	We implement an immediate ioend submission policy here to avoid needing to* chain multiple ioends and hence nest mempool allocations which can violate* forward progress guarantees we need to provide

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