Re: recursive lock-enter-deadlock

[R.Oehler@GDImbH.com]

On 21-Nov-2001 Stephen C. Tweedie wrote:
> Hi,
> 
> On Wed, Nov 21, 2001 at 11:19:13AM +0100, R.Oehler@GDImbH.com wrote:
>> A short question (I don't have a recent 2.4.x at hand, currently):
>> Is this recursive lock-enter-deadlock (2.4.0) fixed in newer kernels?
> 
> Yes.  Seriously, 2.4.0 is so old and so full of bugs like this that
> it's really not worth spending any effort looking for problems like
> that in it.
> 
Well, maybe, but it's the one distributed in SuSE-71. And it supports
block media with sectorsizes >1k. SuSE-73 shipped 2.4.10, which seems
to have a bug in the block layer which prevents me (and out commercial
product) from using 2k-sector and 4k-sector SCSI-media. 
I have to use a kernel from a SuSE-distribution.

The bug is easy to trigger with 
"dd if=/dev/zero of=/dev/sda bs=1M count=1" 
and an MO-drive with 2k-sector-medium.
The symptom is, that sd.c gets misaligned (only 1k-aligned) 
requests and complains loudly to the syslog.)

By the way: 2.4.10-ac works, as Alan says, so what changed in the linus'
kernel and didn't change in the -ac kernel between 2.4.0 and 2.4.10 ?

Regards,
        Ralf


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|  Ralf Oehler
|  GDI - Gesellschaft fuer Digitale Informationstechnik mbH
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time is a funny concept

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