andi,
is it possible for
after the AP1 call_in is done and before AP1 get in tsc_sync_wait
The AP2 call_in done. and then AP1 get in tsc_sync_wait and before it
done, AP2 get in tsc_sync_wait too.
sync_master can not figure out from AP1 or AP2 because only have
go[MASTER] and go{SLAVE].
YH
On 8/10/05, Andi Kleen <[EMAIL PROTECTED]> wrote:
> On Wed, Aug 10, 2005 at 05:43:23PM -0700, yhlu wrote:
> > Yes, I mean more aggressive
> >
> > static void __init smp_init(void)
> > {
> > unsigned int i;
> >
> > /* FIXME: This should be done in userspace --RR */
> > for_each_present_cpu(i) {
> > if (num_online_cpus() >= max_cpus)
> > break;
> > if (!cpu_online(i))
> > cpu_up(i);
> > }
> >
> >
> > let cpu_up take one array instead of one int.
>
> It can be done already by just not starting the CPUs and
> then do it multithreaded from user space using sysfs with
> the CPU hotplug infrastructure. Unfortunately cpu_up
> right now has a global semaphore, so it won't save you any
> time. However it could be done in parallel with other
> startup jobs.
>
> -Andi
>
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