On 2021/10/27 11:38, Jens Axboe wrote: > 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. Forgot: They are all reviewed, including Martin who sent a Reviewed-by for the series, but not an Acked-by for patch 2. As for libata patch 3, obviously, this is Acked-by me. -- Damien Le Moal Western Digital Research
