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From: Max Gurtovoy <maxg@mellanox.com>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: axboe@kernel.dk, sagi@grimberg.me, vladimirk@mellanox.com,
	shlomin@mellanox.com, israelr@mellanox.com,
	linux-nvme@lists.infradead.org, idanb@mellanox.com,
	oren@mellanox.com, kbusch@kernel.org, hch@lst.de
Subject: Re: [PATCH 01/15] nvme: Introduce namespace features flag
Date: Thu, 9 Jan 2020 12:38:05 +0200	[thread overview]
Message-ID: <87553ee2-74f4-8eb9-dd07-552f2637dab8@mellanox.com> (raw)
In-Reply-To: <yq1imllz5l4.fsf@oracle.com>


On 1/9/2020 5:11 AM, Martin K. Petersen wrote:
> Max,
>
>> +#define NVME_NS_DIX_SUPPORTED	(1 << 1)
>> +#define NVME_NS_DIF_SUPPORTED	(1 << 2)
> Not so keen on the DIF/DIX terminology in this context.

Martin,

how about:

+#define NVME_NS_PI_HOST_SUPPORTED (1 << 1)
+#define NVME_NS_PI_CTRL_SUPPORTED (1 << 2)

>
> DIF as a term was obsoleted long ago in T10. The proper term is
> Protection Information which you also use throughout these changes. We
> have lots of DIF references in the kernel for hysterical raisins. But
> let's not create new ones.
>
> DIX is a spec I wrote to describe how controllers could exchange T10
> Protection Information with a host. It's specific to SCSI and although
> DIX is referenced in the NVMe spec, it would not be accurate to describe
> the NVMe features using the term DIX.
>
> So I'm in agreement with Keith that this should be named using more
> descriptive terms such as NVME_NS_PI, NVME_NS_CONTIGUOUS_PI,
> NVME_NS_SEPARATE_PI, or similar.
>

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  reply	other threads:[~2020-01-09 10:38 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-06 13:37 [PATCH 00/15 V3] nvme-rdma/nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` [PATCH] nvme-cli/fabrics: Add pi_enable param to connect cmd Max Gurtovoy
2020-01-06 13:37 ` [PATCH 01/15] nvme: Introduce namespace features flag Max Gurtovoy
2020-01-07 18:07   ` Keith Busch
2020-01-08 12:00     ` Max Gurtovoy
2020-01-09  3:11   ` Martin K. Petersen
2020-01-09 10:38     ` Max Gurtovoy [this message]
2020-01-09 16:26       ` Keith Busch
2020-01-12  9:40         ` Max Gurtovoy
2020-01-13 20:31           ` Keith Busch
2020-01-14 16:04             ` Max Gurtovoy
2020-01-12  9:40         ` Max Gurtovoy
2020-01-06 13:37 ` [PATCH 02/15] nvme: Enforce extended LBA format for fabrics metadata Max Gurtovoy
2020-01-16 23:53   ` James Smart
2020-01-19 11:20     ` Max Gurtovoy
2020-01-21 17:40       ` James Smart
2020-01-06 13:37 ` [PATCH 03/15] nvme: Introduce max_integrity_segments ctrl attribute Max Gurtovoy
2020-01-09  3:12   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 04/15] nvme-fabrics: Allow user enabling metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` [PATCH 05/15] nvme: Introduce NVME_INLINE_PROT_SG_CNT Max Gurtovoy
2020-01-09  3:13   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 06/15] nvme-rdma: Introduce nvme_rdma_sgl structure Max Gurtovoy
2020-01-06 13:37 ` [PATCH 07/15] nvme-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-06 13:37 ` [PATCH 08/15] nvmet: Prepare metadata request Max Gurtovoy
2020-01-06 13:37 ` [PATCH 09/15] nvmet: Add metadata characteristics for a namespace Max Gurtovoy
2020-01-09  3:16   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 10/15] nvmet: Rename nvmet_rw_len to nvmet_rw_data_len Max Gurtovoy
2020-01-09  3:17   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 11/15] nvmet: Rename nvmet_check_data_len to nvmet_check_transfer_len Max Gurtovoy
2020-01-09  3:19   ` Martin K. Petersen
2020-01-06 13:37 ` [PATCH 12/15] nvme: Add Metadata Capabilities enumerations Max Gurtovoy
2020-01-06 13:37 ` [PATCH 13/15] nvmet: Add metadata/T10-PI support Max Gurtovoy
2020-01-09  3:24   ` Martin K. Petersen
2020-01-27 17:17     ` Max Gurtovoy
2020-01-29  2:32       ` Martin K. Petersen
2020-01-17 16:46   ` James Smart
2020-01-19 13:47     ` Max Gurtovoy
2020-01-06 13:37 ` [PATCH 14/15] nvmet: Add metadata support for block devices Max Gurtovoy
2020-01-06 13:37 ` [PATCH 15/15] nvmet-rdma: Add metadata/T10-PI support Max Gurtovoy
2020-01-09  3:29   ` Martin K. Petersen
2020-04-28 13:11 [PATCH 00/15 V6] nvme-rdma/nvmet-rdma: " Max Gurtovoy
2020-04-28 13:11 ` [PATCH 01/15] nvme: introduce namespace features flag Max Gurtovoy
2020-05-01 13:20   ` Christoph Hellwig
2020-05-01 14:24   ` Christoph Hellwig
2020-05-01 14:33     ` Max Gurtovoy

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