是不是这样理解？（DS）

The device object IRP queue also makes use of the global cancel spinlock (see CancelSpinLock::Acquire), as does KDriverManagedQueue, which is functionally equivalent to KDriverManagedQueueEx.
Using the global cancel spinlock, which is a unique system resource, in well traversed code paths, such as those involved in managing a queue, can degrade system performance.


是不是说device object IRP和KDriverManagedQueueEx都利用the global cancel spinlock ？？？
两者都degrade system performance？？？？

up