SCSI_TRACK_QUEUE_FUL(9) | SCSI mid layer | SCSI_TRACK_QUEUE_FUL(9) |
NAME¶
scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth
SYNOPSIS¶
int scsi_track_queue_full(struct scsi_device * sdev, int depth);
ARGUMENTS¶
sdev
depth
DESCRIPTION¶
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.
AUTHORS¶
James Bottomley <James.Bottomley@hansenpartnership.com>
Rob Landley <rob@landley.net>
COPYRIGHT¶
January 2017 | Kernel Hackers Manual 4.8. |