scsi_track_queue_full man page on Scientific

scsi_track_queue_full man page on Scientific

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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
Kernel Hackers Manual 2.6.	 November 2013	       SCSI_TRACK_QUEUE_FUL(9)

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