percpu_pagelist_fraction_sysctl

函数名称：percpu_pagelist_fraction - changes the pcp->high for each zone on each* cpu. It is the fraction of total pages in each zone that a hot per cpu* pagelist can have before it gets flushed back to buddy allocator.

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

返回类型：int

参数：

类型	参数	名称
struct ctl_table *	table
int	write
void __user *	buffer
size_t *	length
loff_t *	ppos

7999

mutex_lock( & prevent >1 _updater_ of zone percpu pageset ->high and ->batch fields )

8000

old_percpu_pagelist_fraction等于percpu_pagelist_fraction

8002

ret等于指定大小读sysctl整数向量

8003

如果非write或ret小于0则转到:out

8007

如果percpu_pagelist_fraction且percpu_pagelist_fraction小于MIN_PERCPU_PAGELIST_FRACTION则

8009

percpu_pagelist_fraction等于old_percpu_pagelist_fraction

8010

ret等于负EINVAL

8011

转到:out

8015

如果percpu_pagelist_fraction恒等于old_percpu_pagelist_fraction则转到:out

8018

以zone 循环如果非Returns true if a zone has memory 则

8018

否则__zone_pcp_update(zone)

8020

out :

8021

mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

8022

返回:ret

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

函数逻辑报告