Il 25/03/2013 08:25, Bart Van Assche ha scritto: >> >> + queue_num = smp_processor_id(); >> + while (unlikely(queue_num >= vscsi->num_queues)) >> + queue_num -= vscsi->num_queues; >> + >> + tgt->req_vq = vq = &vscsi->req_vqs[queue_num]; >> + } >> + >> + spin_unlock_irqrestore(&tgt->tgt_lock, flags); >> + return vq; >> +} > > Is there any reason why the smp_processor_id() % vscsi->num_queues > computation in virtscsi_pick_vq() has been implemented as a loop instead > of as an arithmetic operation ? If so, I would appreciate it if that > could be explained in a comment.
The expectation is that vscsi->num_queues is the same as the number of CPUs in the virtual machine; see patch 5 too. Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
