The MSDN docs don't explain what happens for the various options here (despite being quite clear about the 'WaitMode' paramter). Why would I pick 'Executive' over 'UserRequest' or the myriad other options in KWAIT_REASON?
What is the purpose of the 'WaitReason' parameter on KeWaitForSingleObject()?
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My understanding is that this value is set into the invoking thread's _KTHREAD::WaitReason field, and that it there strictly for diagnostic purposes.
_KTHREAD::WaitReasonis consumed and displayed by various Windows diagnostic services.