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From: Jens Axboe <axboe@kernel.dk>
To: Max Gurtovoy <maxg@mellanox.com>,
	linux-block@vger.kernel.org, martin.petersen@oracle.com,
	linux-nvme@lists.infradead.org, keith.busch@intel.com,
	hch@lst.de, sagi@grimberg.me
Cc: shlomin@mellanox.com, israelr@mellanox.com
Subject: Re: [PATCH v5 2/2] block: centralize PI remapping logic to the block layer
Date: Wed, 11 Sep 2019 16:01:11 -0600
Message-ID: <380932df-2119-ad86-8bb2-3eccb005c949@kernel.dk> (raw)
In-Reply-To: <1568215397-15496-2-git-send-email-maxg@mellanox.com>

On 9/11/19 9:23 AM, Max Gurtovoy wrote:
> @@ -1405,6 +1406,11 @@ bool blk_update_request(struct request *req, blk_status_t error,
>   	if (!req->bio)
>   		return false;
>   
> +	if (blk_integrity_rq(req) && req_op(req) == REQ_OP_READ &&
> +	    error == BLK_STS_OK)
> +		req->q->integrity.profile->complete_fn(req, nr_bytes);
> +
> +
>   	if (unlikely(error && !blk_rq_is_passthrough(req) &&
>   		     !(req->rq_flags & RQF_QUIET)))
>   		print_req_error(req, error, __func__);
> @@ -693,6 +694,10 @@ void blk_mq_start_request(struct request *rq)
>   		 */
>   		rq->nr_phys_segments++;
>   	}
> +
> +	if (blk_integrity_rq(rq) && req_op(rq) == REQ_OP_WRITE)
> +		rq->q->integrity.profile->prepare_fn(rq);
> +
>   }
>   EXPORT_SYMBOL(blk_mq_start_request);

While I like the idea of centralizing stuff like this, I'm also not
happy with adding checks like this to the fast path. But I guess it's
still better than stuff it in drivers.

You have an extra line after both of these above hunks for some reason.
Can you clean that up?

And the blk-mq.c hunk, we have 'q' in that function, use that instead of
rq->q.

-- 
Jens Axboe


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Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-11 15:23 [PATCH v5 1/2] block: use symbolic constants for t10_pi type Max Gurtovoy
2019-09-11 15:23 ` [PATCH v5 2/2] block: centralize PI remapping logic to the block layer Max Gurtovoy
2019-09-11 22:01   ` Jens Axboe [this message]
2019-09-13 22:31     ` Martin K. Petersen
2019-09-16  8:01     ` Christoph Hellwig
2019-09-13 22:26   ` Martin K. Petersen
2019-09-13 22:21 ` [PATCH v5 1/2] block: use symbolic constants for t10_pi type Martin K. Petersen

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