scsi_track_queue_full (9) - Linux Man Pages
scsi_track_queue_full: track QUEUE_FULL events to adjust queue depth
scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth
int scsi_track_queue_full(struct scsi_device
* sdev, int depth);
- SCSI Device in question
- Current number of outstanding SCSI commands on this device, not counting the one returned as QUEUE_FULL.
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.
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
Low level drivers may call this at any time and we will do "The Right Thing." We are interrupt context safe.
James Bottomley <James.Bottomley [at] hansenpartnership.com>
Rob Landley <rob [at] landley.net>