[dm-devel] [RFC PATCH V2 04/13] block: create io poll context for submission and poll task

[Ming Lei]

On Fri, Mar 19, 2021 at 01:05:09PM -0400, Mike Snitzer wrote:
> On Thu, Mar 18 2021 at 12:48pm -0400,
> Ming Lei <ming.lei at redhat.com> wrote:
> 
> > Create per-task io poll context for both IO submission and poll task
> > if the queue is bio based and supports polling.
> > 
> > This io polling context includes two queues:
> 1) submission queue(sq) for storing HIPRI bio submission result(cookie)
>    and the bio, written by submission task and read by poll task.

BTW, V2 has switched to store bio only, and cookie is actually stored in
side bio.

> 2) polling queue(pq) for holding data moved from sq, only used in poll
>    context for running bio polling.
>  
> (nit, but it just reads a bit clearer to enumerate the 2 queues)

OK.

-- 
Ming