[linux-dvb] SAA7146 DMA buffer overflow

Ingo Schneider mail at ingo-schneider.de
Tue Feb 21 21:22:22 CET 2006


Johannes Stezenbach wrote:

>>If this is really a IRQ latency problem, how does it come the timer 
>>interrupt
>>keeps counting jiffies while the SAA7146 cannot get its interrupt handled ?
>>    
>>
>Are you sure the timer irq is serviced? IIRC the x86 timer irq
>handler can detect lost irqs and correctly update jiffies later.
>  
>
Oh, I forgot to say: I compared IRQ0 count to system time, and nothing 
got lost there.

Ciao,
Ingo.



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