Re: [PATCH v4 1/2] nvme: cache struct nvme_ctrl reference to struct nvme_request
From: Johannes Thumshirn
Date: Wed Jun 27 2018 - 03:35:17 EST
On Tue, Jun 26, 2018 at 08:55:32AM -0600, Keith Busch wrote:
> On Tue, Jun 26, 2018 at 03:51:40PM +0200, Johannes Thumshirn wrote:
> > @@ -652,6 +653,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
> > }
> >
> > cmd->common.command_id = req->tag;
> > + nvme_req(req)->ctrl = ctrl;
> > if (ns)
> > trace_nvme_setup_nvm_cmd(req->q->id, cmd);
> > else
>
> I don't think we need to do this per-io. The request coming from the
> controller's tagset, so we can do this just once at .init_request time,
> right?
Agreed, but as it's Sagi's patch I'd like to hear his opinion on this
before changing it.
Byte,
Johannes
--
Johannes Thumshirn Storage
jthumshirn@xxxxxxx +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Jane Smithard, Graham Norton
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850