From: Jens Axboe <axboe@kernel.dk>
To: Johannes Thumshirn <jthumshirn@suse.de>,
Dongli Zhang <dongli.zhang@oracle.com>
Cc: linux-block@vger.kernel.org
Subject: Re: [PATCH 17/17] null_blk: remove legacy IO path
Date: Fri, 12 Oct 2018 08:18:24 -0600 [thread overview]
Message-ID: <0f67146e-6db3-56d7-5500-7a3d31b2ed91@kernel.dk> (raw)
In-Reply-To: <477afa55-24b3-b0ac-0f69-0ebe74beb11c@suse.de>
On 10/12/18 2:51 AM, Johannes Thumshirn wrote:
> On 12/10/18 08:56, Dongli Zhang wrote:
>> Hi Jens,
>>
>> Will the legacy path be fully deprecated?
>>
>> In addition to performance measurement, null_blk is a very good tutorial for
>> beginners to understand how to implement a legacy path based block driver from
>> scratch. Unless legacy path is not used any longer, why not keep it in the code
>> as a tutorial?
>
> But when there is no tutorial on how to write drivers for the legacy
> path no one will write drivers for the legacy path and will be upset
> when we remove it.
Plus the legacy path is going away right now, that's the whole point of
this series of patches. Once this is done, I'm killing all that code.
The whole point of legacy is that it's, well, legacy. Nobody should
be writing that style of driver anymore. null_blk has a clean blk-mq
implementation, that's what people can look at if they want to learn
how to write a new blk-mq driver.
--
Jens Axboe
next prev parent reply other threads:[~2018-10-12 14:18 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-11 16:58 [PATCHSET 0/17] Convert drivers to blk-mq Jens Axboe
2018-10-11 16:58 ` [PATCH 01/17] sunvdc: convert " Jens Axboe
2018-10-15 10:38 ` Ming Lei
2018-10-15 14:19 ` Jens Axboe
2018-10-15 14:50 ` Jens Axboe
2018-10-11 16:58 ` [PATCH 02/17] sx8: " Jens Axboe
2018-10-11 16:58 ` [PATCH 03/17] ps3disk: " Jens Axboe
2018-10-12 22:47 ` Geoff Levand
2018-10-13 0:58 ` Jens Axboe
2018-10-15 16:22 ` Geoff Levand
2018-10-15 16:27 ` Jens Axboe
2018-10-15 16:47 ` Jens Axboe
2018-10-15 18:23 ` Geoff Levand
2018-10-15 18:38 ` Jens Axboe
2018-10-15 19:09 ` Jens Axboe
2018-10-15 19:24 ` Geoff Levand
2018-10-15 19:30 ` Jens Axboe
2018-10-11 16:58 ` [PATCH 04/17] paride: convert pcd " Jens Axboe
2018-10-11 16:58 ` [PATCH 05/17] paride: convert pd " Jens Axboe
2018-10-11 16:58 ` [PATCH 06/17] paride: convert pf " Jens Axboe
2018-10-11 16:58 ` [PATCH 07/17] uml: convert ubd " Jens Axboe
2018-10-15 10:27 ` Ming Lei
2018-10-15 14:16 ` Jens Axboe
2018-10-11 16:59 ` [PATCH 08/17] ms_block: convert " Jens Axboe
2018-10-14 6:30 ` Maxim Levitsky
2018-10-11 16:59 ` [PATCH 09/17] mspro_block: " Jens Axboe
2018-10-11 16:59 ` [PATCH 10/17] gdrom: " Jens Axboe
2018-10-11 16:59 ` [PATCH 11/17] z2ram: " Jens Axboe
2018-10-11 16:59 ` [PATCH 12/17] blk-mq-sched: export way for drivers to insert request Jens Axboe
2018-10-14 18:49 ` Christoph Hellwig
2018-10-14 18:56 ` Jens Axboe
2018-10-11 16:59 ` [PATCH 13/17] ide: convert to blk-mq Jens Axboe
2018-10-11 16:59 ` [PATCH 14/17] aoe: convert aoeblk " Jens Axboe
2018-10-12 11:28 ` Ed Cashin
2018-10-12 14:20 ` Jens Axboe
2018-10-12 16:17 ` Ed Cashin
2018-10-12 16:23 ` Jens Axboe
2018-10-12 16:26 ` Ed Cashin
2018-10-14 0:48 ` Ed Cashin
2018-10-14 18:44 ` Jens Axboe
2018-10-11 16:59 ` [PATCH 15/17] xsysace: convert " Jens Axboe
2018-10-12 5:46 ` Michal Simek
2018-10-11 16:59 ` [PATCH 16/17] mtd_blkdevs: " Jens Axboe
2018-10-11 21:03 ` Richard Weinberger
2018-10-11 21:14 ` Jens Axboe
2018-10-11 21:18 ` Richard Weinberger
2018-10-11 21:21 ` Jens Axboe
2018-10-11 21:31 ` Richard Weinberger
2018-10-11 16:59 ` [PATCH 17/17] null_blk: remove legacy IO path Jens Axboe
2018-10-12 6:56 ` Dongli Zhang
2018-10-12 8:51 ` Johannes Thumshirn
2018-10-12 14:18 ` Jens Axboe [this message]
2018-10-12 17:24 ` Sébastien Boisvert
2018-10-12 17:30 ` Jens Axboe
2018-10-12 17:37 ` Sébastien Boisvert
2018-10-12 17:50 ` Jens Axboe
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 \
--in-reply-to=0f67146e-6db3-56d7-5500-7a3d31b2ed91@kernel.dk \
--to=axboe@kernel.dk \
--cc=dongli.zhang@oracle.com \
--cc=jthumshirn@suse.de \
--cc=linux-block@vger.kernel.org \
/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