this adds a timeline semaphore fastpath which avoids a bunch of cpu overhead, fixes a longstanding bug with long-term deferral of user fences, and more helpfully pretends to do work after the device has been lost
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this adds a timeline semaphore fastpath which avoids a bunch of cpu overhead, fixes a longstanding bug with long-term deferral of user fences, and more helpfully pretends to do work after the device has been lost