Re: [patch 2/3] mm: speculative get_page

On Tue, 4 Apr 2006, Nick Piggin wrote:

> +	/*
> +	 * PageNoNewRefs is set in order to prevent new references to the
> +	 * page (eg. before it gets removed from pagecache). Wait until it
> +	 * becomes clear (and checks below will ensure we still have the
> +	 * correct one).
> +	 */
> +	while (unlikely(PageNoNewRefs(page)))
> +		cpu_relax();

That part looks suspiciously like we need some sort of lock here.
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