Hi!
> > My machine (4cpu x86) hangs while booting a kernel with SMP
> > and preemption enabled. It hangs while executing one of
> > the initcalls, probably BIO since that is where the
> > next boot message comes from during a successful boot with SMP
> > (or preemption) disabled.
> >
> > Has anyone tried out preemption with SMP ?
>
> Sure, all my testing is on SMP. The problem manifested itself in
> 2.5.8-pre when some changes where made to the migration code. The race
> is in the migration code - I am not sure it is preempts fault, per se,
> but the attached patch should fix it. It is pending with Linus for the
> next release.
Wel, if race is in migration code, you should fix migration, not add
preempt_disable(), right? [Or is race preempt-onlly?]
-- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.- 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/
This archive was generated by hypermail 2b29 : Tue Apr 23 2002 - 22:00:31 EST