[PATCH v3 2/2] nvme-rdma: parallelize I/O queue allocation and startup

[Surabhi Gogte (she/her)]

On Fri, Jun 26, 2026 at 12:40 AM Christoph Hellwig <hch at lst.de> wrote:
>
> On Thu, Jun 25, 2026 at 03:27:22PM -0600, Surabhi Gogte wrote:
> > -static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl)
> > +static int nvme_rdma_setup_io_queues(struct nvme_rdma_ctrl *ctrl, unsigned int first,
>
> Overly long line.
>
Yes. My bad, checkpatch didn't catch it. Fixed in v4.

> > +             unsigned int last, size_t queue_size)
> >  {
> > +     ASYNC_DOMAIN_EXCLUSIVE(queue_domain);
> > +     struct nvme_rdma_setup_ctx *ctxs;
> > +     int nr_queues = last - first;
> > +     int err = 0, i, ret;
> >
> > +     ctxs = kmalloc_array(nr_queues, sizeof(*ctxs), GFP_KERNEL);
>
> This should use kmalloc_objs in the brave new world.
>
Done.

> > +     if (!ctxs)
> >               return -ENOMEM;
> >
> > +     for (i = 0; i < nr_queues; i++) {
> > +             struct nvme_rdma_queue *queue = &ctrl->queues[first + i];
> > +
> > +             queue->ctrl = ctrl;
> > +             queue->queue_size = queue_size;
> > +
> > +             ctxs[i].queue = queue;
> > +             ctxs[i].err = &err;
> > +             async_schedule_domain(nvme_rdma_setup_queue_async, &ctxs[i],
> > +                             &queue_domain);
> >       }
> >
> > +     async_synchronize_full_domain(&queue_domain);
> > +     kfree(ctxs);
>
> It would nice if the async domain had a way to do the error propagation.
> Well, that would be a nice follow on if you're interested.
>
> Talking about follow ons:  do you plan to do a similar change
> to nvme-tcp?  It would be great to keep the setup path for
> both in sync.
>
Yeah, there are plans to expand this to nvme-tcp as well.