On 10/26/21 8:22 PM, Damien Le Moal wrote: > From: Damien Le Moal <damien.lemoal@xxxxxxxxxxxxxxxxxx> > > 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
