[parisc-linux] Re: 53c700: tagged queueing problem confirmed

[Daniel Engstrom]

On 2001.10.22 02:34 James Bottomley wrote:
> 5116@telia.com said:
> > I have investigated this some more and I have come to the conclustion
> > that you are quite right. I disabled tagged queueing in the drivber
> > and it instantly bacame stable.
> 
> > Do you have any idea on how to proceed debugging this? 
> 
> Well here's my theory:
> 
> There are a number of reports with tag command queueing problems
> associated with these drives.  In particular, one for freebsd said 
> that the aic7xxx driver was reporting data overruns with TCQ enabled 
> on Quantum Fireballs.
Ok.

I have used these drives with i386 Linux without problems with both the
aix7xxx driver and the sym53c8xx driver. Both these drivers use a default of max
8 tags per lun, so I chnaged the value in your driver and it works.
So, maybe 8 tags per lun is the conservative default here ?

/Daneil 
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