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From: Damien Le Moal <Damien.LeMoal@wdc.com>
To: "linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
	Jens Axboe <axboe@kernel.dk>,
	"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>
Cc: Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH v3 0/4] Initial support for multi-actuator HDDs
Date: Fri, 6 Aug 2021 02:12:04 +0000	[thread overview]
Message-ID: <DM6PR04MB70810037B2C180490FD0C623E7F39@DM6PR04MB7081.namprd04.prod.outlook.com> (raw)
In-Reply-To: 20210726013806.84815-1-damien.lemoal@wdc.com

On 2021/07/26 10:38, 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.

Jens, Martin,

re-ping... Any comment on this series ?

> 
> Changes from v2:
> * Update patch 1 to fix a compilation warning for a potential NULL
>   pointer dereference of the cr argument of blk_queue_set_cranges().
>   Warning reported by the kernel test robot <lkp@intel.com>).
> 
> Changes from v1:
> * Moved libata-scsi hunk from patch 1 to patch 3 where it belongs
> * Fixed unintialized variable in patch 2
>   Reported-by: kernel test robot <lkp@intel.com>
>   Reported-by: Dan Carpenter <dan.carpenter@oracle.com
> * Changed patch 3 adding struct ata_cpr_log to contain both the number
>   of concurrent ranges and the array of concurrent ranges.
> * Added a note in the documentation (patch 4) about the unit used for
>   the concurrent ranges attributes.
> 
> 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 |  30 ++-
>  block/Makefile                      |   2 +-
>  block/blk-cranges.c                 | 295 ++++++++++++++++++++++++++++
>  block/blk-sysfs.c                   |  13 ++
>  block/blk.h                         |   3 +
>  drivers/ata/libata-core.c           |  52 +++++
>  drivers/ata/libata-scsi.c           |  48 ++++-
>  drivers/scsi/sd.c                   |  81 ++++++++
>  drivers/scsi/sd.h                   |   1 +
>  include/linux/ata.h                 |   1 +
>  include/linux/blkdev.h              |  29 +++
>  include/linux/libata.h              |  15 ++
>  12 files changed, 559 insertions(+), 11 deletions(-)
>  create mode 100644 block/blk-cranges.c
> 


-- 
Damien Le Moal
Western Digital Research

  parent reply	other threads:[~2021-08-06  2:12 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-26  1:38 [PATCH v3 0/4] Initial support for multi-actuator HDDs Damien Le Moal
2021-07-26  1:38 ` [PATCH v3 1/4] block: Add concurrent positioning ranges support Damien Le Moal
2021-07-26  7:33   ` Hannes Reinecke
2021-07-26  8:30     ` Damien Le Moal
2021-07-26  8:47       ` Hannes Reinecke
2021-07-26 11:33         ` Damien Le Moal
2021-07-27 14:07           ` Paolo Valente
2021-07-27 23:44             ` Damien Le Moal
2021-08-10  8:23   ` Christoph Hellwig
2021-08-10 11:03     ` Damien Le Moal
2021-08-10 16:02       ` hch
2021-08-10 23:46         ` Damien Le Moal
2021-07-26  1:38 ` [PATCH v3 2/4] scsi: sd: add " Damien Le Moal
2021-08-10  8:24   ` Christoph Hellwig
2021-07-26  1:38 ` [PATCH v3 3/4] libata: support concurrent positioning ranges log Damien Le Moal
2021-07-26  7:34   ` Hannes Reinecke
2021-08-10  8:26   ` Christoph Hellwig
2021-07-26  1:38 ` [PATCH v3 4/4] doc: document sysfs queue/cranges attributes Damien Le Moal
2021-07-26  7:35   ` Hannes Reinecke
2021-08-10  8:27   ` Christoph Hellwig
2021-08-10 11:04     ` Damien Le Moal
2021-07-28 22:59 ` [PATCH v3 0/4] Initial support for multi-actuator HDDs Damien Le Moal
2021-08-06  2:12 ` Damien Le Moal [this message]
2021-08-06  3:41 ` Martin K. Petersen
2021-08-06  4:05   ` Damien Le Moal
2021-08-06  8:35     ` Hannes Reinecke
2021-08-06  8:52       ` Damien Le Moal

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