Re: 2.6.9-rc1: page_referenced_one() CPU consumption

[Hugh Dickins]

On Fri, 10 Sep 2004, Hugh Dickins wrote:
> 
> I'm quite content to go back to a trylock in page_referenced_one - and
> in try_to_unmap_one?  But yours is the first report of an issue there,
> so I'm inclined to wait for more reports (which should come flooding in
> now you mention it!), and input from those with a better grasp than I
> of how vmscan pans out in practice (Andrew, Nick, Con spring to mind).

Just want to add, that there'd be little point in changing that back
to a trylock, if vmscan ends up cycling hopelessly around a larger
loop - though if the larger loop is more preemptible, that's a plus.

Hugh

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