linux-block.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Hannes Reinecke <hare@suse.de>
To: Damien Le Moal <damien.lemoal@wdc.com>,
	linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
	linux-scsi@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-ide@vger.kernel.org
Subject: Re: [PATCH 0/4] Initial support for multi-actuator HDDs
Date: Thu, 22 Jul 2021 17:58:24 +0200	[thread overview]
Message-ID: <c6bbde86-2dff-5d57-4b40-340dea613a69@suse.de> (raw)
In-Reply-To: <20210721104205.885115-1-damien.lemoal@wdc.com>

On 7/21/21 12:42 PM, Damien Le Moal wrote:
> Single LUN multi-actuator hard-disks are cappable to seek and execute
> multiple commands in parallel. This capability is exposed to the host
> using the Concurrent Positioning Ranges VPD page (SCSI) and Log (ATA).
> Each positioning range describes the contiguous set of LBAs that an
> actuator serves.
> 
> This series adds support the scsi disk driver to retreive this
> information and advertize it to user space through sysfs. libata is also
> modified to handle ATA drives.
> 
> The first patch adds the block layer plumbing to expose concurrent
> sector ranges of the device through sysfs as a sub-directory of the
> device sysfs queue directory. Patch 2 and 3 add support to sd and
> libata. Finally patch 4 documents the sysfs queue attributed changes.
> 
> This series does not attempt in any way to optimize accesses to
> multi-actuator devices (e.g. block IO scheduler or filesystems). This
> initial support only exposes the actuators information to user space
> through sysfs.
> 
> Damien Le Moal (4):
>    block: Add concurrent positioning ranges support
>    scsi: sd: add concurrent positioning ranges support
>    libata: support concurrent positioning ranges log
>    doc: document sysfs queue/cranges attributes
> 
>   Documentation/block/queue-sysfs.rst |  27 ++-
>   block/Makefile                      |   2 +-
>   block/blk-cranges.c                 | 286 ++++++++++++++++++++++++++++
>   block/blk-sysfs.c                   |  13 ++
>   block/blk.h                         |   3 +
>   drivers/ata/libata-core.c           |  57 ++++++
>   drivers/ata/libata-scsi.c           |  47 ++++-
>   drivers/scsi/sd.c                   |  80 ++++++++
>   drivers/scsi/sd.h                   |   1 +
>   include/linux/ata.h                 |   1 +
>   include/linux/blkdev.h              |  29 +++
>   include/linux/libata.h              |  11 ++
>   12 files changed, 546 insertions(+), 11 deletions(-)
>   create mode 100644 block/blk-cranges.c
> 
Oh well, you beat me to it.
Actually I have patches here locally, which just had been waiting for 
the missing SBC definitions, which apparently are present now.

Too bad; should have been more aggressive posting them :-)

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer

      parent reply	other threads:[~2021-07-22 15:58 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 10:42 [PATCH 0/4] Initial support for multi-actuator HDDs Damien Le Moal
2021-07-21 10:42 ` [PATCH 1/4] block: Add concurrent positioning ranges support Damien Le Moal
2021-07-22 16:11   ` Hannes Reinecke
2021-07-22 23:20     ` Damien Le Moal
2021-07-22 23:59     ` Damien Le Moal
2021-07-21 10:42 ` [PATCH 2/4] scsi: sd: add " Damien Le Moal
2021-07-21 18:01   ` Dan Carpenter
2021-07-22 16:14   ` Hannes Reinecke
2021-07-22 23:26     ` Damien Le Moal
2021-07-21 10:42 ` [PATCH 3/4] libata: support concurrent positioning ranges log Damien Le Moal
2021-07-22 17:34   ` Hannes Reinecke
2021-07-22 23:27     ` Damien Le Moal
2021-07-21 10:42 ` [PATCH 4/4] doc: document sysfs queue/cranges attributes Damien Le Moal
2021-07-22 15:58 ` Hannes Reinecke [this message]

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=c6bbde86-2dff-5d57-4b40-340dea613a69@suse.de \
    --to=hare@suse.de \
    --cc=axboe@kernel.dk \
    --cc=damien.lemoal@wdc.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-ide@vger.kernel.org \
    --cc=linux-scsi@vger.kernel.org \
    --cc=martin.petersen@oracle.com \
    /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;
as well as URLs for NNTP newsgroup(s).