Re: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt

[Jens Axboe]

On Fri, Nov 07 2003, Nick Piggin wrote:
> 
> 
> Jens Axboe wrote:
> 
> >On Fri, Nov 07 2003, Nick Piggin wrote:
> >
> >>
> >>Jens Axboe wrote:
> >>
> >>
> >>>sys time is usually pretty high if that is the case, and it's hovering
> >>>around 5% here... Prakash, are you sure that dma is enabled on the
> >>>drive? When you see the problem, do a vmstat 1 for 10 seconds so you are
> >>>absolutely sure you are sending the info from when the problem occurs.
> >>>
> >>>
> >>Although have a look at the interrupts field in vmstat 1255, 725, 736 ...
> >>
> >
> >Yeah that is pretty high for just doing a burn, maybe something else is
> >
> 
> ;) you are forgetting 2.6 should give 1000 timer interrupts per second!

Heh indeed, maybe because the archs I use are still at 100. Looks
suspiciously like it's loosing timer interrupts, which would indeed
point to PIO.

-- 
Jens Axboe

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