Re: High CPU usage with sata_nv

[Tejun Heo]

Matthew Fredrickson wrote:
> I have noticed something that might be related as well.  I am working on 
> a device driver that would have periodic data errors due to 
> exceptionally long interrupt handling latency.  I have come to the point 
> that I suspect that it's the sata_nv driver, and now that we can't do 
> the hdparm -u1 option for sata, it seems to be a bigger problem.

That's mostly off topic.  libata configures DMA if at all possible and 
fallback to PIO only after a lot of serious errors.  Is your drive in 
pio mode?  Or does it happen even when in dma mode?

--
tejun
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/