From: Damien Le Moal <Damien.LeMoal@wdc.com>
To: Jens Axboe <axboe@kernel.dk>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>
Subject: Re: [PATCH v8 0/5] Initial support for multi-actuator HDDs
Date: Wed, 27 Oct 2021 00:49:20 +0000 [thread overview]
Message-ID: <DM6PR04MB70810D80EB800CF1CD8F191EE7859@DM6PR04MB7081.namprd04.prod.outlook.com> (raw)
In-Reply-To: 173fe7e1-7e46-1827-5521-3e2648b85fcd@kernel.dk
On 2021/10/27 9:45, Jens Axboe wrote:
> On 9/8/21 8:35 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 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.
>
> Let's get this queued up for 5.16. I forgot what we agreed upon, can go
> either block or SCSI. We likely have a bunch more block changes this
> round than usual, and hence a higher risk of conflict, so from that
> perspective alone I think the block layer would be easier.
>
> In any case, Damien, it needs a respin as it doesn't apply against
> my for-5.16/block at this point.
OK. Thanks. Sending a rebased version very soon (today most likely).
--
Damien Le Moal
Western Digital Research
prev parent reply other threads:[~2021-10-27 0:50 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-09 2:35 [PATCH v8 0/5] Initial support for multi-actuator HDDs Damien Le Moal
2021-09-09 2:35 ` [PATCH v8 1/5] block: Add independent access ranges support Damien Le Moal
2021-09-09 5:59 ` Hannes Reinecke
2021-09-09 2:35 ` [PATCH v8 2/5] scsi: sd: add concurrent positioning " Damien Le Moal
2021-09-09 6:00 ` Hannes Reinecke
2021-09-09 2:35 ` [PATCH v8 3/5] libata: support concurrent positioning ranges log Damien Le Moal
2021-09-09 2:35 ` [PATCH v8 4/5] doc: document sysfs queue/independent_access_ranges attributes Damien Le Moal
2021-09-09 2:35 ` [PATCH v8 5/5] doc: Fix typo in request queue sysfs documentation Damien Le Moal
2021-09-14 0:38 ` [PATCH v8 0/5] Initial support for multi-actuator HDDs Damien Le Moal
2021-09-27 9:17 ` Damien Le Moal
2021-09-29 3:55 ` Martin K. Petersen
2021-10-11 7:50 ` Damien Le Moal
2021-10-11 11:28 ` Tim Walker
2021-10-15 8:20 ` Damien Le Moal
2021-10-27 0:34 ` Keith Busch
2021-10-27 0:45 ` Jens Axboe
2021-10-27 0:49 ` Damien Le Moal [this message]
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