"casler, heather" wrote:
>
> Hello,
> I was looking for this parameter, but must be missing it. Is there a
> defined limit on the total number of SCSI commands or is it tunable?
Are you asking about the maximum number of SCSI commands
that can be queued?
If so the Scsi_Device structure has a member 'queue_depth'
that controls this. This is set by the adapter driver which
may supply a 'select_queue_depth' function pointer (a
callback) for this purpose. This is called by the mid level
during initialization (bus scan). If the callback pointer
is NULL or results in 0 being placed in 'queue_depth' then
the 'cmd_per_lun' value is used as the queue depth instead.
There is no way ** for the user to manipulate the queue
depth in the SCSI mid level. The adapter driver (or the
SCSI BIOS) may offer some facility to control this.
** ioctls SCSI_IOCTL_TAGGED_ENABLE and ..._DISABLE don't
seem to do anything useful in this regard
Doug Gilbert
-
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to [EMAIL PROTECTED]
