引用来自: http://ssms.cs2c.com.cn/otrs/pc.pl?Action=PublicFAQZoom;ItemID=11741 文章主要意思是: 1. page in/out操作指把块设备中的页读入内存或把内存中的页写入块设备 When ever program or data needs to be accessed and is read in from its permanent location on disk, this is called a page in r…