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Date: Thu, 28 Apr 2011 21:01:12 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Adeos-main] Ipipe hangs on ARM MINI2440 after switching
	clocksource
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To: Alexey Galakhov <agalakhov@domain.hid>
Cc: adeos-main@gna.org

Alexey Galakhov wrote:
> 2011/4/28 Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
> 
>> Well, is not that an effect of kgdb? The timer tick occurs 100 or 1000
>> times per second, so, you can not keep up with gdb. The fact that a new
>> interrupts may occur why handling another interrupt is normal with Adeos.
>>
>> It is not to say that there is no irq loop, but we can not conclude from
>> the symptoms you are describing.
>>
>>
> I understand this possibility. I did a simple test: just switched the
> processor back and forth between "run" and "halt" many many times. I did it
> on hardware (JTAG) level so I believe the CPU was running at full speed. And
> it was catched in one of these interrupt handlers every time, I've never
> seen it in any other function. Thus I believe it was doing nothing else. The
> stack is suspicious as well: it has lots of IRQ stuff, nothing but IRQs,
> even if I interrupt the CPU for the first time.
> 
> 
> 
>> Is there an earlier version of the I-pipe patch which was working?
>>
>>
> Unfortunately I've not tested earlier versions. I'll try. They say it worked
> with linux 2.6.29 (ipipe version not mentioned, but it was just before the
> mini2440 timer3 patch was submitted to mainstream):
> http://www.friendlyarm.net/forum/topic/598
> 
> Seems that these guys have the same problem:
> http://www.friendlyarm.net/forum/topic/1108

So, have you tried reverting the timer3 patch?

-- 
                                                                Gilles.