[Carlbyte]

In a code snippet of a dispatch from my driver that works with irql = dispatch_level, I have a zw ... function that works on passive_level. How to solve this problem? Kelowerirql? Pscreatethread?

[Vrtule]

PsCreateSystemThread can be called only on PASSIVE_LEVEL.

KeLowerIrql SHOULD NOT be used this way.

One of the right ways of doing this is to execute the Zw routine in a workitem (ExInitializeWorkItem/IoAllocateWorkItem, ExQueueWorkItem). The execution is asynchronous.

[Carlbyte]

On the internet I also found this way. Is this the only way to solve this problem? thanks

[Vrtule]

It probably depends on what are you trying to accomplish and what causes that the code runts at DISPATCH_LEVEL.

Workitems are a general solution but might not be suitable for all cases. But each of the alternatives means, more or less, implementing your own workitems... sort of.