函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\fs-writeback.c Create Date:2022-07-29 10:41:29
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：__writeback_inodes_wb

函数原型：static long __writeback_inodes_wb(struct bdi_writeback *wb, struct wb_writeback_work *work)

返回类型：long

参数：

类型参数名称
struct bdi_writeback *wb
struct wb_writeback_work *work
1769  start_time等于jiffies
1770  wrote等于0
1772  当非链表为空循环
1773  inode等于wb_inode(链表前项)
1774  sb等于i_sb
1776  如果非rylock_super - try to grab ->s_umount shared*@sb: reference we are trying to grab* Try to prevent fs shutdown. This is used in places where we* cannot take an active reference but we need to ensure that the则
1782  Redirty an inode: set its when-it-was dirtied timestamp and move it to the* furthest end of its superblock's dirty-inode list.* Before stamping the inode's ->dirtied_when, we check to see whether it is
1783  继续下一循环
1785  wrote加等于Write a portion of b_io inodes which belong to @sb.* Return the number of pages and/or inodes written.* NOTE! This is called with wb->list_lock held, and will* unlock and relock that for each inode it ends up doing* IO for.
1786  lease a read lock
1789  如果wrote则
1790  如果ime_is_before_jiffies(a) return true if a is before jiffies (start_time + HZ / 10UL)则退出
1792  如果nr_pages小于等于0则退出
1797  返回:wrote
调用者
名称描述
writeback_inodes_wb
wb_writebackExplicit flushing or periodic writeback of "old" data