scsi_track_queue_full9
Track queue_full events to adjust queue depth
Arguments
sdev
SCSI Device in question
depth
Current number of outstanding SCSI commands on this device, not counting the one returned as QUEUE_FULL.
Overview
This function will track successive QUEUE_FULL events on a specific SCSI device to determine if and when there is a need to adjust the queue depth on the device.
Return
0 - No change needed, >0 - Adjust queue depth to this new depth, -1 - Drop back to untagged operation using host->cmd_per_lun as the untagged command depth
Lock Status: None held on entry
Notes
Low level drivers may call this at any time and we will do “The Right Thing.” We are interrupt context safe.
History
- Debian 9 (Stretch): the text shown here
- Debian 8 (Jessie)
- Debian 7 (Wheezy)
- Debian 6.0 (Squeeze)
- Debian 5.0 (Lenny)