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> - } > - } > + if (unlikely((task_thread_info(next_p)->flags & _TIF_WORK_CTXSW)) > + || test_tsk_thread_flag(prev_p, TIF_IO_BITMAP)) > + __switch_to_xtra(prev_p, next_p, tss); well isn't this replacing an if() (which isn't cheap but also not expensive, due to unlikely()) with an atomic operation (which *is* expensive) ? That to me doesn't make this sound like an actual win.... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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