Thanks,
Pashupati Kumar
Engineering - Celestra1.7
New Delhi, India.
xxxxx@legato.com
Ph: +91-11-6826622/410/846(ext-165)
----- Original Message -----
From: “Steve Whitman”
To: “NT Developers Interest List”
Sent: Wednesday, August 22, 2001 2:27 AM
Subject: [ntdev] Fast I/O Dispatch
> In “Windows NT Device Driver Development” by Peter Viscarola and Tony
Mason
> (1st edition) there is a section on Fast I/O. On page 240 the last
> paragraph states that non-file system drivers can use Fast I/O for
> IRP_MJ_DEVICE_CONTROL. I’ve been using this for our drivers under NT and
> W2K (WDM driver) and in some cases it has provided us with a substantial
> performance improvement.
>
> I’m now testing our drivers on Windows XP and have discovered that the
Fast
> I/O dispatch doesn’t appear to be called at least for non-file system
> drivers. Does anyone have any information on this?
>
> - Steve -
>
>
> —
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