FreeBSD 4.8 and instabilities with Buslogic SCSI drivers in VMWare

[denon]

I agree with your analysis of the 4-year old driver, though it's funny to 
say it's in a difficult to reproduce environment.  In all actuality, a 
software-based system would be one of the most controlled environments 
available, removing all variables of heat, flakey hardware, etc, and 
abstracting them from the hardware layer. VMware seems to be really robust, 
when the OS plays nicely.  (unfortunately win2k under vmware seems to be 
extremely robust, even under high loads .. what luck.)

This aside, I think you'll find that creating a FBSD 4.8 system in a 
scsi-based vmware disk will reproduce it somewhat consistently. I've spoke 
with several others having the same issue.

You'll also take note that I'm not the guy that said this place was dead. :)

Regards,

-d


At 10:43 PM 12/11/2003, you wrote:
>On Thu, 11 Dec 2003, Mike Jakubik wrote:
>
> > It seems like this list is dead, and the developers don't care anymore.
> > Current is where it's at.
>
>This is patently wrong.  Please don't do this.
>
>Since this is an isolated report in a hard-to-reproduce environment
>(vmware), its difficult to say if this is a bug in our software or a bug
>in vmware. Considering the bt driver hasn't been touched in over 4 years,
>I'm thinking that there may be issues in vmware.
>
>I'd follow up with the vmware folks.
>
> >
> > -----Original Message-----
> > From: owner-freebsd-stable at freebsd.org
> > [mailto:owner-freebsd-stable at freebsd.org] On Behalf Of denon
> > Sent: Thursday, December 11, 2003 12:28 PM
> > To: freebsd-stable at freebsd.org
> > Subject: Re: FreeBSD 4.8 and instabilities with Buslogic SCSI drivers in
> > VMWare
> >
> > So there are no other thoughts on this?  I kinda figured people were
> > interested in squashing 4.8 bugs left and right .. :)
> >
> > -d
> >
> > At 03:25 PM 12/8/2003, you wrote:
> > >Responses inline:
> > >
> > >At 03:41 PM 12/7/2003, you wrote:
> > >>On Sun, 7 Dec 2003, denon wrote:
> > >>
> > >> > We've been doing more work with VMware and FreeBSD lately. Overall 
> it's
> > >> > been going well, but we have a machine that's giving me grief, and I'm
> > a
> > >> > bit concerned.
> > >> >
> > >> > It's running 4.8-Release, with a single virtual SCSI drive.  It's been
> > >> > running fine for months, but as of recently, it's started locking
> > >> up.  When
> > >> > it locks up, this is what's in the messages:
> > >> > /kernel: (da0:bt0:0:0:0): CCB 0xca993340 - timed out
> > >> > /kernel: bt0: btdone - Attempt to free non-active BCCB 0xca9933c0
> > >>
> > >>I wonder if the vmware environment is bug-for-bug compatible with the old
> > >>buslogic hardware :-)
> > >
> > >Sure seems it .. though it was stable for a long time, so I don't know ..
> > >
> > >
> > >>I suspect this is a bug in vmware, where the emulated driver is suffering
> > >>from long-term corruption. 43-day bug, perhaps?
> > >>
> > >>Does stopping and starting VMware clear this up?
> > >
> > >Nope, apparently not .. I tried and its happened again today. Seems to
> > >happen about twice a day, but no pattern to it that I see..
> > >
> > >
> > >-d
> > >_______________________________________________
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>
>--
>Doug White                    |  FreeBSD: The Power to Serve
>dwhite at gumbysoft.com          |  www.FreeBSD.org
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