Re: 2.6.9 rc2 freezing

Lee Revell
2004-09-15T17:53:15Z

On Wed, 2004-09-15 at 12:58, Ricky Beam wrote:
> On Wed, 15 Sep 2004, Jeff Garzik wrote:
> >Lee Revell wrote:
> >> Anyway, if you are running anything on your server that breaks under
> >> PREEMPT, it will break anyway as soon as you add another processor.
> >
> >Incorrect. The spinlock behavior is very different.
>
> Indeed. Enable PREEMPT (my default for some time now) and the machine
> will lockup after spewing pages of scheduling while atomic's. Disable
> PREEMPT and the machine is stable again:
>

Interesting. Still, this looks like a specific bug that needs fixing,
it doesn't imply that preemption is a hack. For many workloads
preemption is a necessity.

Lee