Cancel-safe queu with multiple requested buffers.

I have question with Cancel-safe queue problem.

I implemented a Cancle-safe queue inside my driver. In the application, it
makes a request using the overlay I/O with single buffer by calling
DeviceIoControll. So far so good and it works as I expect. However, I found
that using a signle buffer is a little bit slow in performance. I plan to
change

to use a multiple-buffer scheme. Here is my concerns

1. Can the multiple-buffer scheme improve the driver perforamce?

2. Do I need to create a different event for each buffer in application when
making the overlay I/O call? Can I use one single event for all requested
buffers?



.

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