cvs commit: src/sys/cam cam_xpt.c

[Scott Long]

Eric Anderson wrote:
> Matt Jacob wrote:
> 
>> mjacob      2005-09-16 01:26:17 UTC
>>
>>  FreeBSD src repository
>>
>>  Modified files:
>>    sys/cam              cam_xpt.c  Log:
>>  Make the exploring of all luns supported by an HBA more of a
>>  tunable (until we get REPORT LUNS in place).
>>  
>>  If we're probing luns, and each probe succeeds, we keep going past
>>  lun 7 if we're a SCSI3 or better device (until we fail to probe).
>>  
>>  If we're probing luns, and a probe fails, we only keep going if
>>  we're quirked *for* it (CAM_QUIRK_HILUNS), and if we're not quirked
>>  *against* it (CAM_QUIRK_NOHILUNS), or we're a SCSI3 or better device
>>  and the tunable (kern.cam.cam_srch_hi) is set non-zero.
>>  
>>  Reviewed by:    nate at rootlabs.org, gibbs at scsiguy.com, ken at kdm.com, 
>> scottl at samsco.org
>>  MFC after:      1 week
>>  
>>  Revision  Changes    Path
>>  1.156     +38 -5     src/sys/cam/cam_xpt.c
>>  
>>
> 
> Matt, do you think this would fix issues with Qlogic (FC) cards scanning 
> and finding duplicate luns on some FC devices? (I see that in 6.0, but 
> not in 5.x).
> 
> Eric
> 
> 

We added more aggressive LUN scanning code into 6-CURRENT a few months
ago, but didn't merge it back to 5-STABLE precisely becasue we knew that
it might cause problems.  This commit will hopefully address those
problems by making the scanning less aggressive by default but more
configurable.

Scott