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From: John Garry <[email protected]>
To: Christoph Hellwig <[email protected]>
Cc: [email protected], [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], [email protected],
	[email protected], Alan Adamson <[email protected]>
Subject: Re: [PATCH v4 10/11] nvme: Atomic write support
Date: Tue, 20 Feb 2024 08:50:40 +0000	[thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>

On 20/02/2024 08:31, Christoph Hellwig wrote:
> Thanks for writing a good commit message!
> 
>> NVMe namespaces may define an atomic boundary, whereby no atomic guarantees
>> are provided for a write which straddles this per-lba space boundary. The
>> block layer merging policy is such that no merges may occur in which the
>> resultant request would straddle such a boundary.
>>
>> Unlike SCSI, NVMe specifies no granularity or alignment rules.
> 
> Well, the boundary really is sort of a granularity and alignment,
> isn't it?

NVMe does indeed have the boundary rule, but it is not really the same 
as SCSI granularity and alignment.

Anyway, I can word that statement to be clearer.

Thanks,
John

  reply	other threads:[~2024-02-20  8:56 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-02-19 13:00 [PATCH v4 00/11] block atomic writes John Garry
2024-02-19 13:00 ` [PATCH v4 01/11] block: Pass blk_queue_get_max_sectors() a request pointer John Garry
2024-02-19 18:57   ` Keith Busch
2024-02-19 13:01 ` [PATCH v4 02/11] block: Call blkdev_dio_unaligned() from blkdev_direct_IO() John Garry
2024-02-19 18:57   ` Keith Busch
2024-02-20  8:31     ` John Garry
2024-02-20  6:54   ` Christoph Hellwig
2024-02-19 13:01 ` [PATCH v4 03/11] fs: Initial atomic write support John Garry
2024-02-19 19:16   ` David Sterba
2024-02-20  8:13     ` John Garry
2024-02-19 22:44   ` Dave Chinner
2024-02-20  9:52     ` John Garry
2024-02-24 18:16   ` Ritesh Harjani
2024-02-24 18:20     ` Ritesh Harjani
2024-02-26  8:58       ` John Garry
2024-02-26  9:13         ` Ritesh Harjani
2024-02-26  9:46           ` John Garry
2024-02-26  8:51     ` John Garry
2024-02-19 13:01 ` [PATCH v4 04/11] fs: Add initial atomic write support info to statx John Garry
2024-02-19 22:28   ` Dave Chinner
2024-02-20  9:40     ` John Garry
2024-02-20  8:20   ` Christoph Hellwig
2024-02-20  9:01     ` John Garry
2024-02-24 18:46   ` Ritesh Harjani
2024-02-26  9:07     ` John Garry
2024-02-19 13:01 ` [PATCH v4 05/11] block: Add core atomic write support John Garry
2024-02-19 22:58   ` Dave Chinner
2024-02-20  8:22     ` Christoph Hellwig
2024-02-20 10:01     ` John Garry
2024-02-25 12:09   ` Ritesh Harjani
2024-02-25 12:21     ` Ritesh Harjani
2024-02-26  9:23     ` John Garry
2024-02-19 13:01 ` [PATCH v4 06/11] block: Add atomic write support for statx John Garry
2024-02-20  8:29   ` Christoph Hellwig
2024-02-20  9:35     ` John Garry
2024-02-25 14:20   ` Ritesh Harjani
2024-02-26  9:36     ` John Garry
2024-02-19 13:01 ` [PATCH v4 07/11] block: Add fops atomic write support John Garry
2024-02-25 14:46   ` Ritesh Harjani
2024-02-26  9:46     ` John Garry
2024-02-19 13:01 ` [PATCH v4 08/11] scsi: sd: Atomic " John Garry
2024-02-19 13:01 ` [PATCH v4 09/11] scsi: scsi_debug: " John Garry
2024-02-20  7:12   ` Ojaswin Mujoo
2024-02-20  9:01     ` John Garry
2024-02-19 13:01 ` [PATCH v4 10/11] nvme: " John Garry
2024-02-19 19:21   ` Keith Busch
2024-02-20  6:55     ` Christoph Hellwig
2024-02-20  8:19       ` John Garry
2024-02-20  8:31   ` Christoph Hellwig
2024-02-20  8:50     ` John Garry [this message]
2024-02-19 13:01 ` [PATCH v4 11/11] nvme: Ensure atomic writes will be executed atomically John Garry

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