Re: [PATCH] solved APM bug with -rc5

Alan Cox (alan@lxorguk.ukuu.org.uk)
01 Aug 2002 23:37:36 +0100


On Thu, 2002-08-01 at 22:17, Willy TARREAU wrote:
> On Thu, Aug 01, 2002 at 02:54:08PM -0600, Richard Gooch wrote:
> > Richard Gooch writes:
> > > Hm. I bet you didn't try this with CONFIG_PREEMPT=y, right? IIRC, the
> > > wonderful world of preemption means that you can get rescheduled on
> > > another CPU without warning, unless you take a lock or explicitely
> > > disable preemption.
> >
> > Apologies. I forgot that CONFIG_PREEMPT is a 2.5.x feature, and
> > doesn't exist on 2.4 (thankfully).
>
> Never mind, your comment is interesting anyway because it shows that
> preemption patch for 2.4 needs to adapt to such updates.

Pre-emption for 2.4 needs to do a lot of work on raid and even athlon
compiles to fix the FPU stuff, let alone corner cases

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