Re: [RFC] respect the referenced bit of KVM guest pages?

[Rik van Riel]

Wu Fengguang wrote:

> This is a quick hack to materialize the idea. It remembers roughly
> the last 32*SWAP_CLUSTER_MAX=1024 active (mapped) pages scanned,
> and if _all of them_ are referenced, then the referenced bit is
> probably meaningless and should not be taken seriously.

This has the potential to increase the number of active
pages scanned by almost a factor 1024.  Let me whip up an
alternative idea when I get to the office later today.

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