At 12:31 PM 7/18/2003 +0200, Wiktor Wodecki wrote:
>On Fri, Jul 18, 2003 at 12:18:33PM +0200, Mike Galbraith wrote:
> > That _might_ (add salt) be priorities of kernel threads dropping too low.
> >
> > I'm also seeing occasional total stalls under heavy I/O in the order of
> > 10-12 seconds (even the disk stops).  I have no idea if that's 
> something in
> > mm or the scheduler changes though, as I've yet to do any isolation and/or
> > tinkering.  All I know at this point is that I haven't seen it in stock 
> yet.
>
>I've seen this too while doing a huge nfs transfer from a 2.6 machine to
>a 2.4 machine (sparc32). Thought it'd be something with the nfs changes
>which were recently, might be the scheduler, tho. Ah, and it is fully
>reproducable.

Telling to not mess with my kernel threads seems to have fixed it here... 
no stalls during the whole contest run.  New contest numbers attached.

         -Mike