[linux-dvb] SAA7146 DMA buffer overflow

Ingo Schneider mail at ingo-schneider.de
Tue Feb 21 08:26:27 CET 2006


Edgar Toernig wrote:

>Ingo Schneider wrote:
>  
>
>>As one sees, the latency for the IRQ is as high as 74 milliseconds, 
>>    
>>
>Wow, that's pretty big.  Did you check your disk settings with hdparm?
>Especially the unmaskirq and use_dma flags?
>  
>
Yes, everything seems fine:

/dev/hda:
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)

/dev/hdb:
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)

/dev/hdc:
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)

Ciao,
Ingo.



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