table of contents
| 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
SCSI Device in question
depth
Current number of outstanding SCSI commands on this
device, not counting the one returned as QUEUE_FULL.
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.
RETURNS¶
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>
Author.
Rob Landley <rob@landley.net>
Author.
COPYRIGHT¶
| May 2024 | Kernel Hackers Manual 2.6. |