函数逻辑报告 |
Source Code:mm\backing-dev.c |
Create Date:2022-07-27 15:48:51 |
Last Modify:2020-03-12 14:18:49 | Copyright©Brick |
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函数名称:wait_iff_congested - Conditionally wait for a backing_dev to become uncongested or a pgdat to complete writes*@sync: SYNC or ASYNC IO*@timeout: timeout in jiffies* In the event of a congested backing_dev (any backing_dev) this waits* for up to @timeout
函数原型:long wait_iff_congested(int sync, long timeout)
返回类型:long
参数:
类型 | 参数 | 名称 |
---|---|---|
int | sync | |
long | timeout |
1120 | DEFINE_WAIT(wait) |
1121 | wqh等于congestion_wqh[sync] |
1127 | 如果atomic_read( & nr_wb_congested[sync])恒等于0则 |
1140 | ret等于This task is about to go to sleep on IO. Increment rq->nr_iowait so* that process accounting knows that this is a task in IO wait state. |
1143 | out : |
1144 | trace_writeback_wait_iff_congested(jiffies_to_usecs(timeout), jiffies_to_usecs(jiffies - start)) |
1147 | 返回:ret |
名称 | 描述 |
---|---|
shrink_node |
源代码转换工具 开放的插件接口 | X |
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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 |