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SubjectRe: [PATCH, RESEND] microblaze: Fix level interrupt ACKing
Steven J. Magnani wrote:
> On Fri, 2009-11-20 at 12:07 +0100, Michal Simek wrote:
>> Hi Steve,
>>
>> steve@digidescorp.com wrote:
>>> Level interrupts need to be ack'd in the unmask handler, as in powerpc.
>>> Among other issues, this bug causes the system clock to appear to run at
>>> double-speed.
>> Can you send me any step-by-step manual how to demonstrate me this
>> fault? If system clock runs at double-speed, then I should be able able
>> to see that time is two times faster. Or do you mean different behavior?
>
> Unless there's a way to read jiffies_64 in userspace, the easiest way I
> know of is to use the debugger. Stop the kernel soon after you boot it,
> and read jiffies_64. Continue execution for some known amount of
> wall-clock time, then stop the kernel again and recheck jiffies_64.
> Without the patch, the number of elapsed jiffies is twice what you'd
> expect based on HZ.

yes, I saw that behavior. Just thinking what caused that jiffies was two
times faster.

But anyway. I added this patch to next branch.

Thanks,
Michal

>
>> Thanks,
>> Michal
>
> Regards,
> ------------------------------------------------------------------------
> Steven J. Magnani "I claim this network for MARS!
> www.digidescorp.com Earthling, return my space modulator!"
>
> #include <standard.disclaimer>
>
>
>
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--
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663


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