> + if (hctx) {
> + int cmd_sz = q->tag_set->cmd_size;
> + int node = hctx->numa_node;
> +
> + fq = kzalloc_node(sizeof(*fq), GFP_KERNEL, node);
> + if (!fq)
> + goto failed;
> +
> + rq_sz = round_up(rq_sz + cmd_sz, cache_line_size());
> + fq->flush_rq = kzalloc_node(rq_sz, GFP_KERNEL, node);
> + if (!fq->flush_rq)
> + goto rq_failed;
> +
> + spin_lock_init(&fq->mq_flush_lock);
> + } else {
> + fq = kzalloc(sizeof(*fq), GFP_KERNEL);
> + if (!fq)
> + goto failed;
> +
> + fq->flush_rq = kzalloc(rq_sz, GFP_KERNEL);
> + if (!fq->flush_rq)
> + goto rq_failed;
> + }
Seems like this would be a lot cleaner by passing the cmd_size and
node_id explicitly. The added benefit would be that we could also
pass the node for the blk_init_queue_node() case.
> +static void __blk_mq_exit_flush(struct request_queue *q,
> + unsigned free_end, unsigned int exit_end)
> +{
> + struct blk_mq_hw_ctx *hctx;
> + unsigned int k;
> + struct blk_flush_queue *fq;
> + struct blk_mq_tag_set *set = q->tag_set;
> + unsigned start_idx = set->queue_depth;
> +
> + queue_for_each_hw_ctx(q, hctx, k) {
> + if (k >= free_end)
> + break;
> +
> + fq = hctx->fq;
> + if (k < exit_end && set->ops->exit_request)
> + set->ops->exit_request(set->driver_data,
> + fq->flush_rq, k,
> + start_idx + k);
> +
> + blk_free_flush_queue(fq);
> + }
Can we merge the mq init/exit case into some existing for each hctx
loop in blk-mq?
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