Re: [PATCH] 2.4.23-pre8 driver udpate for MPT Fusion (2.05.10)

[Andreas Haumer <andreas@xss.co.at>]

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Hi!

Moore, Eric Dean wrote:
> Here's a patch for 2.4.23-pre8 kernel for MPT Fusion driver, coming from LSI
> Logic.
>
[...]
>
> (8)	In a mixed device configuration (Ultra 320 and Non-Ultra
> 320 devices are present on an HBA channel), code was fixed to prevent
>  negotiating for QAS on all Ultra 320 devices on that channel.
> This keeps the Ultra 320 devices from dominating the SCSI bus,
> preventing Non-Ultra 320 IO's from executing.
>
[...]

Uh Oh...

Is this a fix for the problems I reported back in June
to LKML and to Pam Delaney?

On June, 12th, I sent a mail to Pam reporting system freezes
I had on an ASUS AP 1700-S5 server with onboard 53C1030
controller. In this mail I speculated about the possibility
of a mixed device configuration beeing the source of the problem:

[...]
Another idea: is it possible that the SCSI controller
has problems with U160 and U320 SCSI disks mixed together
on the same bus? As far as I know there shouldn't be a
problem with this combination, but who knows?

I always tested with a mix of the following SCSI disks:

IBM DDYS-T18350M (18GB U160 SCA)
IBM IC35L036UCDY10-0 (36GB U320 SCA)

I'm currently running 2.4.20 with 4 U320 disks and no
U160 disk in the how swap cage. The system is now up for
about 6 hours and no SCSI timeout occured so far (this
doesn't say anything. Sometimes it takes 24 hours before
a SCSI timeout or even a freeze occurs)
[...]

I haven't got an answer to this report, but with a
all-U320 configuration I never had system freezes since.
Does the new driver now work in a U160/U320 mixed
configuration, too?

- - andreas

- --
Andreas Haumer                     | mailto:andreas@xss.co.at
*x Software + Systeme              | http://www.xss.co.at/
Karmarschgasse 51/2/20             | Tel: +43-1-6060114-0
A-1100 Vienna, Austria             | Fax: +43-1-6060114-71
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