[PATCH 3/3] blk-mq: directly poll requests

[Daniel Wagner]

On Tue, Mar 21, 2023 at 05:23:50PM -0700, Keith Busch wrote:
> From: Keith Busch <kbusch at kernel.org>
> 
> Polling needs a bio with a valid bi_bdev, but neither of those are
> guaranteed for polled driver requests. Make request based polling use
> directly use blk-mq's polling function.
> 
> When executing a request from a polled hctx, we know the request's
> cookie, and that it's from a live multi-queue that supports polling, so
> we can safely skip everything that bio_poll provides.
> 
> Link: http://lists.infradead.org/pipermail/linux-nvme/2023-March/038340.html
> Reported-by: Martin Belanger <Martin.Belanger at dell.com>
> Reported-by: Daniel Wagner <dwagner at suse.de>
> Signed-off-by: Keith Busch <kbusch at kernel.org>

I've tested the whole series and this patch alone with rdma and tcp.

Tested-by: Daniel Wagner <dwagner at suse.de>
Revieded-by: Daniel Wagner <dwagner at suse.de>