Re: Bug: SCSI driver hangs in 2.6.6 and 2.6.7

Re: Bug: SCSI driver hangs in 2.6.6 and 2.6.7

[Kai OM]

The particular issue I'm having appears not to be a compiler issue; it's
happened when compiled using several versions of GCC, unless it's a
problem occuring in a range of versions of GCC.

My drive should be running in 32 bit synch, as well, but the newer
driver seems to force it into asynch.

I can't infer a lot about this issue, since I'm not a programmer or SCSI
expert, but I can observe and correlate.

Another person I know of has this issue as well, appended are links to
some log files of his.

http://ronmon.shacknet.nu/configs/scsi_boot_error

http://ronmon.shacknet.nu/configs/dmesg_good-2.6.7-rc3

http://ronmon.shacknet.nu/phpsysinfo/

http://ronmon.shacknet.nu/configs/lspci-vvx

----- Original message -----
From: "Thomas Greve" <thomas.greve@gmx.de>
To: "Kai OM" <epimetreus@fastmail.fm>
Date: Wed, 30 Jun 2004 01:46:54 +0200 (MEST)
Subject: Bug: SCSI driver hangs in 2.6.6 and 2.6.7

Hi Kai.

I encountered the same problem here, the kernel being caught in an
endless
loop during domain validation in scsi_transport_spi.c:spi_dv_retrain().

Interesting enough, this happens only while validating the 2nd of my two
hard disks (IBM DPSS-318350N on a Dawi Control sym80c875 host adapter).

The mm patches seem to contain a fix for this; since i did not get any
"dropping back" error messages after patching the file, this might as
well
be an optimisation problem with gcc 3.3.3.

After applying that patch, i got my kernel booting again, but the driver
reports / configures the hard disk as "asynchronous", what i suspect
might
be an unnecessary bottle neck:

<6>scsi(0:0:2:0): Beginning Domain Validation
<6>sym0:2: wide asynchronous.
<6>sym0:2: FAST-20 WIDE SCSI 40.0 MB/s ST (50.0 ns, offset 16)
<6>scsi(0:0:2:0): Ending Domain Validation

Hope this helps,

-- 
- Thomas