Messages in this thread | | | Date | Wed, 08 Apr 2015 11:22:01 +0800 | From | Chong Yuan <> | Subject | Re: blk-mq : blk_mq_map_swqueue maybe |
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nimisolo,
在 4/8/2015 10:10 AM, nimisolo 写道: > Hi Jens, > > In blk_mq_map_swqueue(), all the blk_mq_hw_ctx's nr_ctx are set > to zero, and then each blk_mq_ctx's index_hw is set to nr_ctx. > I think the index_hw means the index of the hardware queue that map > to this software queue, so maybe index_hw should be set to > blk_mq_hw_ctx's queue_num.
Multiple sw queues may be dispatched to one hw queue. So index_hw here means the index of the sw queue in corresponding hw queue.
--yc
> > I'm a student and I probably have misunderstood this code, please help > me to resolve this confusion. Thank you. > > static void blk_mq_map_swqueue(struct request_queue *q) > { > ......... > queue_for_each_hw_ctx(q, hctx, i) { > ......... > hctx->nr_ctx = 0; > } > ......... > queue_for_each_ctx(q, ctx, i) { > ......... > ctx->index_hw = hctx->nr_ctx; > ......... > } > } > -- > 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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