函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\dax.c Create Date:2022-07-29 10:56:19
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：@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.

函数原型：static void dax_wake_entry(struct xa_state *xas, void *entry, bool wake_all)

返回类型：void

参数：

类型参数名称
struct xa_state *xas
void *entry
boolwake_all
190  wq等于dax_entry_waitqueue(xas, entry, & key)
198  如果waitqueue_active -- locklessly test for waiters on the queue*@wq_head: the waitqueue to test for waiters* returns true if the wait list is not empty* NOTE: this function is lockless and requires care, incorrect usage _will_则__wake_up - wake up threads blocked on a waitqueue
调用者
名称描述
put_unlocked_entry
dax_unlock_entryWe used the xa_state to get the entry, but then we locked the entry and* dropped the xa_lock, so we know the xa_state is stale and must be reset* before use.
grab_mapping_entryFind page cache entry at given index. If it is a DAX entry, return it* with the entry locked. If the page cache doesn't contain an entry at* that index, add a locked empty entry.* When requesting an entry with size DAX_PMD, grab_mapping_entry() will
dax_writeback_one