On Thu, 2008-07-31 at 21:04 +0900, Yasunori Goto wrote:

quoted text
> +int remove_pgdat(int nid)
> +{
> +	struct pglist_data *pgdat = NODE_DATA(nid);
> +
> +	if (cpus_busy_on_node(nid))
> +		return -EBUSY;
> +
> +	if (sections_busy_on_node(pgdat))
> +		return -EBUSY;
> +
> +	node_set_offline(nid);
> +	synchronize_sched();
> +	synchronize_srcu(&pgdat_remove_srcu);
> +
> +	free_pgdat(nid, pgdat);
> +
> +	return 0;
> +}

FWIW synchronize_sched() is the wrong function to use here,
synchronize_rcu() is the right one.

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