svn commit: r188570 - head/sys/cam

[Scott Long]

Attila Nagy wrote:
> Hello,
> 
> Scott Long wrote:
>> Author: scottl
>> Date: Fri Feb 13 10:04:59 2009
>> New Revision: 188570
>> URL: http://svn.freebsd.org/changeset/base/188570
>>
>> Log:
>>   In the case that the probe has determined that it can't query the 
>> device for
>>   a serial number, fall through to the next case so that initial 
>> negotiation
>>   still happens.  Without this, devices were showing up with only 1 
>> available
>>   tag opening, leading to observations of very poor I/O performance.
>>     This should fix problems reported with VMWare Fusion and ESX.  Early
>>   generation MPT-SAS controllers with SATA disks might also be affected.
>>   HP CISS controllers are also likely affected, as are many other
>>   pseudo-scsi disk subsystems.
>>   
> Is it possible that these two are related?
> http://marc.info/?l=freebsd-scsi&m=122900270413265&w=2
> 

This is a bug in Domain Validation, introduced a couple of years ago, 
that I still haven't sorted out.

Scott