On 10/27/19 8:05 AM, Damien Le Moal wrote: > This series implements a few improvements and cleanups to zone block > device zone reset operations with the first three patches. > > The remaining of the series patches introduce zone open, close and > finish support, allowing users of zoned block devices to explicitly > control the condition (state) of zones. > > While these operations are not stricktly necessary for the correct > operation of zoned block devices, the open and close operations can > improve performance for some device implementations of the ZBC and ZAC > standards under write workloads. The finish zone operation, which > transition a zone to the full state, can also be useful to protect a > zone data by preventing further zone writes. > > These operations are implemented by introducing the new > REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH request codes > and the function blkdev_zone_mgmt() to issue these requests. This new > function also replaces the former blkdev_reset_zones() function to reset > zones write pointer. > > The new ioctls BLKOPENZONE, BLKCLOSEZONE and BLKFINISHZONE are also > defined to allow applications to issue these new requests without > resorting to a device passthrough interface (e.g. SG_IO). > > Support for these operations is added to the SCSI sd driver, to the dm > infrastructure (dm-linear and dm-flakey targets) and to the null_blk > driver. Can patch 3 go in separately, doesn't look like we need it in this series? Also need the DM folks to review/sign off on patch 7. Mike? -- Jens Axboe
