From: Damien Le Moal <damien.lemoal@wdc.com>
To: 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: [PATCH 0/4] Initial support for multi-actuator HDDs
Date: Wed, 21 Jul 2021 19:42:01 +0900 [thread overview]
Message-ID: <20210721104205.885115-1-damien.lemoal@wdc.com> (raw)
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
--
2.31.1
next reply other threads:[~2021-07-21 11:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-21 10:42 Damien Le Moal [this message]
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 ` [PATCH 0/4] Initial support for multi-actuator HDDs Hannes Reinecke
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