Repair Windows Error 0x0000000F    |    STOP 0x0000000F    |    SPIN_LOCK_ALREADY_OWNED


STOP 0x0000000F : SPIN_LOCK_ALREADY_OWNED

STOP Errors are usually the result of a hardware malfunction or device driver issue. It is also possible to receive a Blue Screen Error due to bad system memory, malfunctioning power supply, components overheating, or hardware overclocked beyond its specification. In older versions of the Windows OS you may also receive Blue Screen Errors due to incompatible DLL files.

Since the only option when receiving a Blue Screen Error is to reboot, any unsaved data is lost. With that in mind, it is very important to eliminate these errors to protect your data.

Basic Troubleshooting

Troubleshooting STOP Errors can be a difficult and time consuming process. Try these basic steps to fix your own Blue Scree Error. We hope it will help you avoid an expensive service call and provide a rewarding experience of solving the problem on your own.

Advanced Troubleshooting

The following details are for advanced users. These are provided for your convenience and may help those with advanced knowledge discover the root cause of their STOP Error.


Stop 0xF: SPIN_LOCK_ALREADY_OWNED

The SPIN_LOCK_ALREADY_OWNED stop error code has a value of 0x0000000F. This indicates that a request for a spin lock has been initiated when the spin lock was already owned.

Parameters

None

Cause

Typically, this error is caused by a recursive request for a spin lock. It can also occur if something similar to a recursive request for a spin lock has been initiated—for example, when a spin lock has been acquired by a thread, and then that same thread calls a function, which also tries to acquire a spin lock. The second attempt to acquire a spin lock is not blocked in this case because doing so would result in an unrecoverable deadlock. If the calls are made on more than one processor, then one processor will be blocked until the other processor releases the lock.

This error can also occur, without explicit recursion, when all threads and all spin locks are assigned an IRQL. Spin lock IRQLs are always greater than or equal to DPC level, but this is not true for threads. However, a thread that is holding a spin lock must maintain an IRQL greater than or equal to that of the spin lock. Decreasing the thread IRQL below the IRQL level of the spin lock that it is holding allows another thread to be scheduled on the processor. This new thread could then attempt to acquire the same spin lock.

Resolving the Problem

Ensure that you are not recursively acquiring the lock. And, for threads that hold a spin lock, ensure that you are not decreasing the thread IRQL to a level below the IRQL of the spin lock that it is holding.

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Fix Windows Registry Errors    |    Repair Windows Error 0x0000000F    |    SPIN_LOCK_ALREADY_OWNED