函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\page-writeback.c Create Date:2022-07-27 15:32:59
Last Modify:2022-05-23 13:25:58 Copyright©Brick
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函数名称：dirty_bytes_handler

函数原型：int dirty_bytes_handler(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos)

返回类型：int

参数：

类型参数名称
struct ctl_table *table
intwrite
void __user *buffer
size_t *lenp
loff_t *ppos
557  old_bytes等于vm_dirty_bytes starts at 0 (disabled) so that it is a function of* vm_dirty_ratio * the amount of dirtyable memory
560  ret等于指定大小读sysctl长整数向量
561  如果ret恒等于0且write且vm_dirty_bytes starts at 0 (disabled) so that it is a function of* vm_dirty_ratio * the amount of dirtyable memory不等于old_bytes则
562  If ratelimit_pages is too high then we can get into dirty-data overload* if a large number of processes all perform writes at the same time
563  The generator of dirty data starts writeback at this percentage等于0
565  返回:ret