摘要: When a transition between user mode and kernel mode is required in an operating system, a context switch is not necessary; a mode transition is not by itself a context switch. However, depending on the operating system, a context switch may also take place at this time. 阅读全文
posted @ 2011-04-26 05:22 史莱姆 阅读(217) 评论(0) 推荐(0) 编辑