On Tue, Jun 11, 2019 at 07:17:14PM +0800, Fam Zheng wrote:
> On Mon, 06/10 19:18, Aarushi Mehta wrote:
> > + /* Prevent infinite loop if submission is refused */
> > + if (ret <= 0) {
> > + if (ret == -EAGAIN) {
> > + continue;
> > + }
> > + break;
> > + }
> > + s->io_q.in_flight += ret;
> > + s->io_q.in_queue -= ret;
> > + }
> > + s->io_q.blocked = (s->io_q.in_queue > 0);
>
> I'm confused about s->io_q.blocked. ioq_submit is where it gets updated, but
> if it becomes true, calling ioq_submit will be fenced. So how does it get
> cleared?When blocked, additional I/O requests are not submitted until the next completion. See qemu_luring_process_completions_and_submit() for the code path where ioq_submit() gets called again. Stefan
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