Re: [PATCH] anobjrmap 5/6 anonmm

[Rik van Riel]

On Thu, 18 Mar 2004, Hugh Dickins wrote:

> +	(*mapcount)--;

> +	if (anonmm->mm && anonmm->mm->rss) {
> +		referenced += page_referenced_one(
> +			page, anonmm->mm, page->index, mapcount);
> +		if (!*mapcount)
> +			goto out;
>  	}

Brilliant little optimisation over what I thought Linus
proposed at first.  This certainly removes the biggest
disadvantage I (and presumably Andrea) thought the mm
based reverse mapping would have !

I like this code a lot...

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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