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From: Jens Axboe <axboe@kernel.dk>
To: Damien Le Moal <damien.lemoal@wdc.com>,
	linux-block@vger.kernel.org, linux-ide@vger.kernel.org,
	"Martin K . Petersen" <martin.petersen@oracle.com>,
	linux-scsi@vger.kernel.org
Subject: Re: [PATCH v9 0/5] Initial support for multi-actuator HDDs
Date: Tue, 26 Oct 2021 20:38:08 -0600	[thread overview]
Message-ID: <cea34b2a-6835-d090-4f0c-3bf456a6ed00@kernel.dk> (raw)
In-Reply-To: <20211027022223.183838-1-damien.lemoal@wdc.com>

On 10/26/21 8:22 PM, Damien Le Moal wrote:
> From: Damien Le Moal <damien.lemoal@opensource.wdc.com>
> 
> 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 to 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.
> Patch 5 fixes a typo in the document file (strictly speaking, not
> related to this series).
> 
> This series does not attempt in any way to optimize accesses to
> multi-actuator devices (e.g. block IO schedulers or filesystems). This
> initial support only exposes the independent access ranges information
> to user space through sysfs.

I've applied 1/9 for now, as that clearly belongs in the block tree.
Might be the cleanest if SCSI does a post tree that depends on
for-5.16/block. Or I can apply it all as they are reviewed. Let me
know.

-- 
Jens Axboe


  parent reply	other threads:[~2021-10-27  2:38 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-27  2:22 [PATCH v9 0/5] Initial support for multi-actuator HDDs Damien Le Moal
2021-10-27  2:22 ` [PATCH v9 1/5] block: Add independent access ranges support Damien Le Moal
2021-10-27  2:22 ` [PATCH v9 2/5] scsi: sd: add concurrent positioning " Damien Le Moal
2021-10-27  2:22 ` [PATCH v9 3/5] libata: support concurrent positioning ranges log Damien Le Moal
2021-11-02 10:40   ` Geert Uytterhoeven
2021-11-02 11:42     ` Damien Le Moal
2021-11-02 14:02       ` Geert Uytterhoeven
2021-11-04  6:20         ` Damien Le Moal
2021-10-27  2:22 ` [PATCH v9 4/5] doc: document sysfs queue/independent_access_ranges attributes Damien Le Moal
2021-10-27  2:22 ` [PATCH v9 5/5] doc: Fix typo in request queue sysfs documentation Damien Le Moal
2021-10-27  2:37 ` (subset) [PATCH v9 0/5] Initial support for multi-actuator HDDs Jens Axboe
2021-10-27  2:38 ` Jens Axboe [this message]
2021-10-27  2:46   ` Damien Le Moal
2021-10-27  2:52     ` Martin K. Petersen
2021-10-27  2:53       ` Damien Le Moal
2021-10-27  2:49   ` Damien Le Moal
2021-10-27  3:03     ` Jens Axboe
2021-10-27  3:42       ` Damien Le Moal
2021-10-27  3:03 ` (subset) " Jens Axboe

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