RELENG_7: interrupt eating whole cpu core

[Chuck Swiger]

Hi, Dominic--

On Feb 6, 2008, at 11:12 AM, Dominic Fandrey wrote:
>> behaviour has changed. This is an HP 6510b GR695EA#ABD, if anyone  
>> thinks it might be helpful, I can supply you with a dmesg and the  
>> output of pciconf -lv.
>
> The problem remains with fresh sources:
>
>  PID USERNAME   THR PRI NICE   SIZE    RES STATE  C   TIME    CPU  
> COMMAND
>   12 root         1 171 ki31     0K    16K RUN    0  22:04 97.85%  
> idle: cpu0
>   37 root         1 -64    -     0K    16K CPU1   1   2:35 96.00%  
> irq14: ata0
>   11 root         1 171 ki31     0K    16K RUN    1  19:32  6.40%  
> idle: cpu1
>
> The rip is done by k3b, so the drive is accessed through the cam  
> interface.

What are the values being reported by "sysctl hw.ata"?  If you're  
going to be burning CD/DVDs, you really want to make sure  
hw.ata.atapi_dma is on.

Regards,
-- 
-Chuck