User and kernel mode switching

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.
posted @ 2011-04-26 05:22  史莱姆  阅读(216)  评论(0)  编辑  收藏  举报