Hi Ming,
On Thu, Jun 28, 2018 at 11:19:16AM +0800, Ming Lei wrote:
> + list_for_each_entry(rq, list, queuelist) {
> BUG_ON(rq->mq_ctx != ctx);
> - list_del_init(&rq->queuelist);
> - __blk_mq_insert_req_list(hctx, rq, false);
> + trace_block_rq_insert(hctx->queue, rq);
> }
I wonder if we really need the above loop unconditionally. It does
some BUG_ON() sanity checking (which I hate but it was already there
so not your problem) and tracing of the request insertion.
So can we maybe only run this loop if tracing is enabled? Not sure if
this is possible though. Maybe Steven (Cced) can help here.
Byte,
Johannes
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