Re: [patch] voluntary-preempt-2.6.8.1-P4

Lee Revell
2004-08-20T10:34:04Z

On Fri, 2004-08-20 at 06:27, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
>
> > This is an extreme load situation, so I don't think it will be a
> > real-world problem. I have not seen it under any normal workload.
>
> well, 9 msecs is still not nice. I've been able to trigger larger than
> 10msec latencies too on a 2 GHz box.
>

If this is the case then should a make -j12 have ground the machine
to a halt the way it did?

> hm, tcp_collapse() in net/ipv4/tcp_input.c. Could you try to just return
> from that function? Collapsing skbs of a given socket is not a
> necessary functionality (it is only a 'nice' thing to have in OOM
> situations) and it indeed can introduce quite high latencies.
>

OK, will test this.

Lee