Maximum Buffered I/O data size in UMDF and KMDF?

I need to send large I/O messages (IRPs) to both a UMDF and KMDF driver. What is the msximum size in either driver model?

Could you also point me to where this is documented?

First, both KMDF and UMDF are subject to the same rules that a WDM driver is in terms of absolute maximum buffer size that the io manager supports. In the KMDF case, there is no limit in the framework, we just process the incoming IRP as is. I will need to check on UMDF to see if there is a limitation on buffer size.

d

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Subject: [ntdev] Maximum Buffered I/O data size in UMDF and KMDF?

I need to send large I/O messages (IRPs) to both a UMDF and KMDF driver. What is the msximum size in either driver model?

Could you also point me to where this is documented?


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