In IOAcceleratorFamily2, the value 0xfffffff9 is associated with the following two error messages: "%s: failed to alloc memory for block fence!\\n" "%s: failed to allocate memory\\n" So presumably it means "out of memory".
Bug 1576767 Comment 91 Edit History
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In IOAcceleratorFamily2, the error 0xfffffff9 is associated with the following two error messages: "%s: failed to alloc memory for block fence!\\n" "%s: failed to allocate memory\\n" So presumably it means "out of memory".