[mythtv-users] ivtv0 warning: ENC Stream 0 OVERFLOW

Al McIntosh junkmail at allanmcintosh.com
Mon Jan 9 01:23:52 UTC 2006


chris at cpr.homelinux.net wrote:

>On Sat, Jan 07, 2006 at 09:34:41AM -0500, Al McIntosh wrote:
>  
>
>>>>Dec 15 07:28:27 mythbox kernel: ivtv0 warning: ENC Stream 0  OVERFLOW 
>>>>#2:
>>>>Stealing a Buf
>>>>fer, 512 currently allocated
>>>>        
>>>>
>>More memory does not appear to help. Did anyone manage a fix for this?
>>    
>>
>
>In my case, it turned out that my network card was on the same IRQ as 
>all three IDE channels (software RAID-5), and while the box would 
>usually record OK, if I was doing something network-intensive (like 
>watching TV on the remote Myth frontend) the network card would 
>generate so many IRQs it was delaying the drives to the point where 
>the front-end would stutter, ivtv would overflow, and eventually the 
>RAID driver would fail a drive.  That would have been fine, except 
>that the ethernet watchdog (tulip driver) would panic the kernel.  I 
>tried forcing the cards to specific IRQs but the tulip driver 
>wouldn't behave.  I switched to a different ethernet port and ALL of 
>the problems went away.
>


Interesting, I have a rather fast mythbox, AMD 2800+ with 1G ram and a 
single pvr250.  The buffer overflow often occurs in the middle of the 
night when the only load on the machine is mythbackend recording.




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