Mark Johnston 02fb845bbf Fix a few uses of kern_yield() in the TTM and the LinuxKPI. ... kern_yield(0) effectively causes the calling thread to be rescheduled immediately since it resets the thread's priority to the highest possible value. This can cause livelocks when the pattern "while (!trylock()) kern_yield(0);" is used since the thread holding the lock may linger on the runqueue for the CPU on which the looping thread is running. MFC after: 1 week		2017-05-18 18:35:14 +00:00
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common	Fix a few uses of kern_yield() in the TTM and the LinuxKPI.	2017-05-18 18:35:14 +00:00