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SubjectRe: [PATCH 02/11] mm,migration: Do not try to migrate unmapped anonymous pages
On Thu, 25 Mar 2010, Mel Gorman wrote:

> Christoph is opposed to removing it because of cache-hotness issues more
> so than use-after-free concerns. The refcount is needed with or without
> SLAB_DESTROY_BY_RCU.

The issue is only performance. If we can preserve the cache hotness in a
different way (or do things in a completely different manner) then its
fine.

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