[alsa-devel] PATCH - MIDI on ice1724 - real-time kernel problem SOLVED(?)
pavel.hofman at insite.cz
Thu May 29 18:14:10 CEST 2008
Martin Krüger wrote:
> Pavel Hofman schrieb:
>> Hi Martin,
> Hi Pavel,
> now i'm confused. I just compiled the current daily snapshot with
> "./configure --with-isapnp=no --with-sequencer=yes --with-oss=no
> --with-debug=verbose --with-cards=ice1724".
> That should give as much debug messages as i need, as i understood. I
> get only one Message, telling me that ice1724 is using the defined
> eeprom. After using the midi output port, there is no more message in
> any log at all.
That is OK, it means the loop-detection code does not kick in, i.e.
there is no problem with clearing interrupt status bits.
> Due to this, it is really hard to understand the problem, for me it
> looks like a complete freeze. If i would get "just" a heavy overload,
> the numlock should still react within 10 minutes, and the cpu cooler
> should be louder. Both of this should also happen during an irq flood,
> if i understood that right.
My IRQ flood loaded the PC heavily, but I could still switch windows and
move mouse around, with long delays. Yours looks like a real freeze.
> Do you have any idea how to find out whats happening there?
I just add debug printk's to major code points all the way down to
bottom functions. It takes many compiling and rebooting (after freezes).
Unfortunately I do not know of any other way to hunt the bug down.
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