dax_entry_waitqueue

函数名称：dax_entry_waitqueue

函数原型：static wait_queue_head_t *dax_entry_waitqueue(struct xa_state *xas, void *entry, struct exceptional_entry_key *key)

返回类型：wait_queue_head_t

参数：

类型	参数	名称
struct xa_state *	xas
void *	entry
struct exceptional_entry_key *	key

151

index等于xa_index

158

如果dax_is_pmd_entry(entry)则index与等于The 'colour' (ie low bits) within a PMD of a page offset. 的反

160

xa等于xa

161

entry_start等于index

163

hash等于hash_long((unsignedlong)xa ^ index, We choose 4096 entries - same as per-zone page wait tables )

164

返回:wait_table加hash

**调用者**
名称	描述
dax_wake_entry	@entry may no longer be the entry at the index in the mapping.* The important information it's conveying is whether the entry at* this index used to be a PMD entry.
get_unlocked_entry	Look up entry in page cache, wait for it to become unlocked if it* is a DAX entry and return it. The caller must subsequently call* put_unlocked_entry() if it did not lock the entry or dax_unlock_entry()* if it did
wait_entry_unlocked	The only thing keeping the address space around is the i_pages lock* (it's cycled in clear_inode() after removing the entries from i_pages)* After we call xas_unlock_irq(), we cannot touch xas->xa.

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