Re: Fatal trap 18 on Current 1386 since Saturday 21 Feb 2009

Manfred Antar wrote:
> At 13:58 2/26/2009, you wrote:
>> Manfred Antar wrote:
>>> At 07:36 2/25/2009, Gavin Atkinson wrote:
>>>> My suspicion is that it is this commit:
>>>>
>>>> http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1637857+0+archive/2009/svn-src-all/20090222.svn-src-all 
>>>>
>>>> Might be worthwhile trying the source from just before, and just after
>>>> it and seeing if that is the cause.
>>> Yes that's it I put:
>>> /sys/dev/ata/ata-all.c
>>> /sys/dev/ata/ata-all.h
>>> /sys/dev/ata/ata-pci.h
>>> /sys/dev/ata/ata-sata.c
>>> /sys/dev/ata/chipsets/ata-promise.c
>> >from before the changes on the 21st in current /sys and kernel builds and boots fine
>>> My original date of the 14th was wrong, I looked at the calendar thought it was the 14th
>>> but actually uname -a of the last working kernel was the 21st 7am.
>> Looking on on your first and later posts I would say that this commit may happen not a root of your problem. It may just trigger something else.
>>
>> Problem begins when some of your drives on ata1 channel timeouts request that leads to several controller reinits. I think that durung that driver somehow gets wrong drive parameters that leads to division by zero error inside ata_tf_write().
>>
>> I have just committed one patch that probably does not fix the problem, but change process a bit. Could you try it and send me all ata related verbose messages starting from controller detection.
> 
> Sure. I only have one Hard Drive and a DVD drive in this computer.

I have committed patch (r189166) which I think should fix your crash. 
Test it please.

-- 
Alexander Motin