When I read the code of raid0_make_request,I meet some questions. 1\ block = bio->bi_sector >> 1,it's the device offset in kilotytes. so why do we use block substract zone->zone_offset? The zone->zone_offset is the zone offset relative the mddev in sectors. 2\ the codes below: x = block >> chunksize_bits; tmp_dev = zone->dev[sector_div(x, zone->nb_dev)]; actually, we get the underlying device by 'sector_div(x, zone->nb_dev)'.The var x is the chunk nr relative to the start of the mddev in my opinion.But not all of the zone->nb_dev is the same, so we cann't get the right rdev by 'sector_div(x, zone->nb_dev)', I think. Why?Could you explain them to me? Thanks! Regards. YangLiu - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
