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tmscsim/DC390/AM53C974 2.0d10 Linux SCSI driver

daemon@ATHENA.MIT.EDU (Kurt Garloff)
Tue Jun 22 06:11:28 1999

Date: 	Tue, 22 Jun 1999 09:42:37 +0200
From: Kurt Garloff <garloff@suse.de>
To: Linux SCSI list <linux-scsi@vger.rutgers.edu>, kernel@suse.de
Mail-Followup-To: Linux SCSI list <linux-scsi@vger.rutgers.edu>,
	kernel@suse.de


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Hi everyone,

two weeks ago, I announced tmscsim 2.0d8 which had some improvements. It
should have resulted in less bugs and slightly better performance.

I did tell you that it is the 2.0e candidate for inclusion into the kernel.

I got some reports, most of which were indicating that 2.0d8 is really fine.
However, one report was about a case, where 2.0d would have nicely handled a
disk with I/O error and 2.0d8 didn't. 2.0d8 got stuck in an abort() loop and
the system became unusable.

Now, I spent some work on the driver again:
* I improved the driver's command queueing
* I fixed some problems arising when dynamically changing the max no of tags
* I fixed the abort() routine. (No, it's not perfect yet, but much better.)

I don't know, why the 2.0d8 driver got into the abort() routine in the first
place, where 2.0d didn't. The abort in 2.0d is as buggy as in 2.0d8.
So I want to have this problem solved and then release 2.0e into the kernel.

I have heavily tested the driver on my box, so I don't expect any trouble
from the command queueing changes.

I'd like to ask everybody to test 2.0d10 and tell me, if there are old or
new problems.=20
See http://www.garloff.de/kurt/linux/dc390/ for driver sources.

Looking forward to reading your reports ...
--=20
Kurt Garloff  <garloff@suse.de>           SuSE GmbH, N=FCrnberg, FRG
Linux kernel development;    SCSI driver: DC390 (tmscsim/AM53C974)

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