From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Sun, 04 Sep 2005 09:41:24 +0300
From: Heikki Lindholm <holindho@domain.hid>
MIME-Version: 1.0
Subject: Re: [Adeos-main] adeos i386 and ppc patches forward ported to	2.6.13
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To: Philippe Gerum <philippe.gerum@domain.hid>
Cc: Stelian Pop <stelian@domain.hid>, adeos-main@gna.org

Philippe Gerum kirjoitti:
> Quoting Stelian Pop <stelian@domain.hid>:
> 
>> Le jeudi 01 septembre 2005 à 15:52 +0200, Philippe Gerum a écrit :
>>
>>> >> Are you sure this is not the same I was experiencing, eg. missed
>>> >> decrementer interrupt that stalls the machine (looks like hard 
>>> lock-up)
>>> >> for two minutes.
>>> >
>>> > I tried waiting (at least 5 minutes) and nothing happened.
>>> >
>>>
>>> Here is a revisited version of Heikki's patch applicable against an
>>> Adeos-patched kernel, and which is expected to solve the lagging
>>> interrupt sync
>>> issue; tested on a mpc8541 board. I'd be interested to know if this
>>> still fixes
>>> the issue discovered on ppc64, and maybe on the G4.
>>
>>
>> Does not change a thing on the G4.
>>
> 
> Of, so if Heikki confirms that this patch works on ppc64, I guess that 
> we have a
> brand new shiny bug to chase, with lots of headbanging sessions ahead. 
> And I'm
> not talking about dance style here...

I've now tried both 32- and 64-bit kernels on the G5 with and without 
the patch and the results seem consistent with the G4. Without the 
patch, stalls happen always with nucleus loaded, but I didn't observe 
any with the patch. However, I'm still not happy with how the patch 
handles the !threaded case: If everyone had handlers like
my_handler(...);
{
    traps++;
    return PROPAGATE;
}
the patch wouldn't help at all. I'd prefer something more along the 
lines of my original posting.

-- Heikki Lindholm