From: John Garry <[email protected]>
To: Christoph Hellwig <[email protected]>
Cc: Kanchan Joshi <[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],
[email protected], [email protected], [email protected],
[email protected], [email protected],
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Alan Adamson <[email protected]>
Subject: Re: [PATCH v8 10/10] nvme: Atomic write support
Date: Tue, 18 Jun 2024 08:22:03 +0100 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On 18/06/2024 07:49, Christoph Hellwig wrote:
>> Only NVMe supports an LBA space boundary, so that part is specific to NVMe.
>>
>> Regardless, the block layer already should ensure that the atomic write
>> length and boundary is respected. nvme_valid_atomic_write() is just an
>> insurance policy against the block layer or some other component not doing
>> its job.
>>
>> For SCSI, the device would error - for example - if the atomic write length
>> was larger than the device supported. NVMe silently just does not execute
>> the write atomically in that scenario, which we must avoid.
> It might be worth to expand the comment to include this information to
> help future readers.
OK, will do. I have been asked this more than once now.
John
next prev parent reply other threads:[~2024-06-18 7:23 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-10 10:43 [PATCH v8 00/10] block atomic writes John Garry
2024-06-10 10:43 ` [PATCH v8 01/10] block: Pass blk_queue_get_max_sectors() a request pointer John Garry
2024-06-10 10:43 ` [PATCH v8 02/10] block: Generalize chunk_sectors support as boundary support John Garry
2024-06-10 10:43 ` [PATCH v8 03/10] fs: Initial atomic write support John Garry
2024-06-12 20:51 ` Darrick J. Wong
2024-06-10 10:43 ` [PATCH v8 04/10] fs: Add initial atomic write support info to statx John Garry
2024-06-12 20:54 ` Darrick J. Wong
2024-06-13 7:25 ` John Garry
2024-06-10 10:43 ` [PATCH v8 05/10] block: Add core atomic write support John Garry
2024-06-17 18:56 ` Keith Busch
2024-06-18 6:51 ` Christoph Hellwig
2024-06-18 7:46 ` John Garry
2024-06-18 17:25 ` Keith Busch
2024-06-19 7:59 ` John Garry
2024-06-19 8:02 ` Christoph Hellwig
2024-06-19 10:42 ` John Garry
2024-06-19 16:07 ` Martin K. Petersen
2024-06-10 10:43 ` [PATCH v8 06/10] block: Add atomic write support for statx John Garry
2024-06-10 10:43 ` [PATCH v8 07/10] block: Add fops atomic write support John Garry
2024-06-10 10:43 ` [PATCH v8 08/10] scsi: sd: Atomic " John Garry
2024-06-10 10:43 ` [PATCH v8 09/10] scsi: scsi_debug: " John Garry
2024-06-10 10:43 ` [PATCH v8 10/10] nvme: " John Garry
2024-06-17 17:24 ` Kanchan Joshi
2024-06-17 18:04 ` John Garry
2024-06-18 6:49 ` Christoph Hellwig
2024-06-18 7:22 ` John Garry [this message]
2024-06-14 2:01 ` [PATCH v8 00/10] block atomic writes Martin K. Petersen
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