Re: [PATCH v2 2/2] virtio-blk: support completion batching for the IRQ path

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On Wed, Dec 21, 2022 at 10:46 PM Suwan Kim <suwan.kim027@xxxxxxxxx> wrote:
>
> On Wed, Dec 21, 2022 at 02:48:30AM -0800, Christoph Hellwig wrote:
> > > +           if (likely(!blk_should_fake_timeout(req->q)) &&
> > > +                   !blk_mq_complete_request_remote(req) &&
> > > +                   !blk_mq_add_to_batch(req, iob, vbr->status,
> > > +                                           virtblk_complete_batch))
> >
> > One tab indents for line continuations are really confusing.  Please
> > make this:
> >
> >               if (likely(!blk_should_fake_timeout(req->q)) &&
> >                   !blk_mq_complete_request_remote(req) &&
> >                   !blk_mq_add_to_batch(req, iob, vbr->status,
> >                                        virtblk_complete_batch))
> >
> > > +   found = virtblk_handle_req(vq, iob);
> > >
> > >     if (found)
> >
> > You can drop the found variable here now:
> >
> >       if (virtblk_handle_req(vq, iob))
> >               blk_mq_start_stopped_hw_queues(vblk->disk->queue, true);
> >
>

Ah, virtblk_poll() should return found to indicate whether a request
was processed. I'll leave this as is.

Regards,
Suwan Kim



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