读深入解析windows操作系统 ，++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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读深入解析windows操作系统 ，++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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AntBean 2010-12-10, 16:48 下午

书中提到：

“.....IO系统必须将系统内存中的数据拷贝到调用者的虚拟地址空间中，如果IRP是以同步方式完成的，则调用者的地址空间是当前可直接访问的。但如果此IRP是以异步方式完成的，则IO管理器必须将此IRP的完成延迟到它可以访问调用者的地址空间为止。”

我觉得很疑惑，难道IRP在以同步方式完成的情况下，调用者的地址空间就可以直接访问？

是不是说，在同步方式下，如果读取设备成功就直接返回，这个期间，当前进行同步读取的线程所在的进程不可能被调度？

恳请指点。

Re: 读深入解析windows操作系统 ，++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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王宇 2010-12-12, 03:59 上午
兄台不至于加这么长的 ++++ 吧... 我找个回复按钮都要拖半天 ( 我现在穷的都用不起鼠标... )

看这里：

http://advdbg.org/dfstore//img/Understanding%20and%20Using%20Execution%20Context%20in%20Windows%20NT%20Drivers.pdf

这可是 OSR 1996 年的文章，到现在都没过时，可见微软的兼容性。

唉 想当年我也真闲，还有心情用 Latex 整理文章...

Re: 读深入解析windows操作系统 ，++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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AntBean 2010-12-14, 15:04 下午

谢谢王宇兄。

我当时一不留神，多点了几下，结果就拖了这么长了。。。