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From: Keith Busch <kbusch@kernel.org>
To: Bart Van Assche <bvanassche@acm.org>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
	Damien Le Moal <damien.lemoal@wdc.com>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	Khazhy Kumykov <khazhy@google.com>,
	Jaegeuk Kim <jaegeuk@kernel.org>,
	Sagi Grimberg <sagi@grimberg.me>,
	Chaitanya Kulkarni <kch@nvidia.com>
Subject: Re: [PATCH 4/5] nvme: Increase the number of retries for zoned writes
Date: Tue, 14 Jun 2022 11:03:51 -0700	[thread overview]
Message-ID: <YqjNh4T+m1C4voTj@kbusch-mbp.dhcp.thefacebook.com> (raw)
In-Reply-To: <20220614174943.611369-5-bvanassche@acm.org>

On Tue, Jun 14, 2022 at 10:49:42AM -0700, Bart Van Assche wrote:
> @@ -854,6 +854,10 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
>  	if (req->cmd_flags & REQ_RAHEAD)
>  		dsmgmt |= NVME_RW_DSM_FREQ_PREFETCH;
>  
> +	if (blk_rq_is_seq_write(req))
> +		nvme_req(req)->max_retries += req->q->nr_hw_queues *
> +			req->q->nr_requests;

Even with the weakest nvme devices, the result of this is unlikely to fit in a
u8.

  reply	other threads:[~2022-06-14 18:04 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-14 17:49 [PATCH 0/5] Improve zoned storage write performance Bart Van Assche
2022-06-14 17:49 ` [PATCH 1/5] block: Introduce the blk_rq_is_seq_write() function Bart Van Assche
2022-06-16 20:41   ` Jens Axboe
2022-06-16 21:16     ` Bart Van Assche
2022-06-14 17:49 ` [PATCH 2/5] scsi: Retry unaligned zoned writes Bart Van Assche
2022-06-14 21:47   ` Khazhy Kumykov
2022-06-14 22:39     ` Bart Van Assche
2022-06-14 23:50       ` Damien Le Moal
2022-06-14 23:54         ` Bart Van Assche
2022-06-15  0:55           ` Damien Le Moal
2022-06-14 23:29   ` Damien Le Moal
2022-06-14 23:56     ` Bart Van Assche
2022-06-15  1:09       ` Damien Le Moal
2022-06-15  5:49       ` Christoph Hellwig
2022-06-15  7:21         ` Damien Le Moal
2022-06-15 19:38           ` Bart Van Assche
2022-06-16  0:14             ` Damien Le Moal
2022-06-15 19:42         ` Bart Van Assche
2022-06-16 18:36         ` Bart Van Assche
2022-06-14 17:49 ` [PATCH 3/5] nvme: Make the number of retries request specific Bart Van Assche
2022-06-14 17:49 ` [PATCH 4/5] nvme: Increase the number of retries for zoned writes Bart Van Assche
2022-06-14 18:03   ` Keith Busch [this message]
2022-06-14 17:49 ` [PATCH 5/5] block/mq-deadline: Remove zone locking Bart Van Assche
2022-06-14 23:40   ` Damien Le Moal

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