1SCSI_TRACK_QUEUE_FUL(9)         SCSI mid layer         SCSI_TRACK_QUEUE_FUL(9)
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NAME

6       scsi_track_queue_full - track QUEUE_FULL events to adjust queue depth
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SYNOPSIS

9       int scsi_track_queue_full(struct scsi_device * sdev, int depth);
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ARGUMENTS

12       sdev
13           SCSI Device in question
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15       depth
16           Current number of outstanding SCSI commands on this device, not
17           counting the one returned as QUEUE_FULL.
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DESCRIPTION

20       This function will track successive QUEUE_FULL events on a specific
21       SCSI device to determine if and when there is a need to adjust the
22       queue depth on the device.
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RETURNS

25       0 - No change needed, >0 - Adjust queue depth to this new depth, -1 -
26       Drop back to untagged operation using host->cmd_per_lun as the untagged
27       command depth
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LOCK STATUS

30       None held on entry
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NOTES

33       Low level drivers may call this at any time and we will do “The Right
34       Thing.”  We are interrupt context safe.
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AUTHORS

37       James Bottomley <James.Bottomley@hansenpartnership.com>
38           Author.
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40       Rob Landley <rob@landley.net>
41           Author.
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44Kernel Hackers Manual 2.6.       November 2011         SCSI_TRACK_QUEUE_FUL(9)
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