From: Keith Busch <[email protected]>
To: John Garry <[email protected]>
Cc: Christoph Hellwig <[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], [email protected],
Himanshu Madhani <[email protected]>
Subject: Re: [PATCH v8 05/10] block: Add core atomic write support
Date: Tue, 18 Jun 2024 11:25:29 -0600 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
On Tue, Jun 18, 2024 at 08:46:31AM +0100, John Garry wrote:
>
> About NVMe, the spec says that NABSN and NOIOB may not be related to one
> another (command set spec 1.0d 5.8.2.1), but I am wondering if people really
> build HW which would have different NABSN/NABSPF and NOIOB. I don't know.
The history of NOIOB is from an nvme drive that had two back-end
controllers with their own isolated storage, and then striped together
on the front end for the host to see. A command crossing the stripe
boundary takes a slow path to split it for each backend controller's
portion and merge the results. Subsequent implementations may have
different reasons for advertising this boundary, but that was the
original.
Anyway, there was an idea that the stripe size could be user
configurable, though that never shipped as far as I know. If it had,
then the optimal NOIOB could be made larger, but the atomic write size
doesn't change.
next prev parent reply other threads:[~2024-06-18 17:25 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 [this message]
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
2024-06-14 2:01 ` [PATCH v8 00/10] block atomic writes Martin K. Petersen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
[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] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
[email protected] \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox