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    SubjectRe: [PATCH 7/8] ppc64: SPU file system

    > /run A stub file that lets us do ioctl. The only ioctl
    > method we need is the spu_run() call. spu_run suspends
    > the current thread from the host CPU and transfers
    > the flow of execution to the SPU.
    > The ioctl call return to the calling thread when a state
    > is entered that can not be handled by the kernel, e.g.
    > an error in the SPU code or an exit() from it.
    > When a signal is pending for the host CPU thread, the
    > ioctl is interrupted and the SPU stopped in order to
    > call the signal handler.

    ioctl's are generally considered evil ... what about a write() method
    writing a command ?


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