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    [PATCH] spufs: Improved SPU preemptability. · 5110459f
    Arnd Bergmann 提交于
    This patch makes it easier to preempt an SPU context by
    having the scheduler hold ctx->state_sema for much shorter
    periods of time.
    
    As part of this restructuring, the control logic for the "run"
    operation is moved from arch/ppc64/kernel/spu_base.c to
    fs/spufs/file.c.  Of course the base retains "bottom half"
    handlers for class{0,1} irqs.  The new run loop will re-acquire
    an SPU if preempted.
    
    From: Mark Nutter <mnutter@us.ibm.com>
    Signed-off-by: NArnd Bergmann <arndb@de.ibm.com>
    Signed-off-by: NPaul Mackerras <paulus@samba.org>
    5110459f
file.c 20.4 KB