> +/*
> + * Update dispatch busy with EWMA:
Please expand the EWMA acronym.
> +static void blk_mq_update_hctx_busy(struct blk_mq_hw_ctx *hctx, bool busy)
> +{
> + const unsigned weight = 8;
> + unsigned int ewma;
> +
> + if (hctx->queue->elevator)
> + return;
> +
> + ewma = READ_ONCE(hctx->dispatch_busy);
> +
> + ewma *= weight - 1;
> + if (busy)
> + ewma += 16;
plese use descriptive all upper case #defines for the WEIGHT and FACTOR
so that they stick out.
