Re: [PATCH] mm: inactive-clean list

From: Christoph Lameter
Date: Tue Jul 18 2006 - 09:57:34 EST

On Tue, 18 Jul 2006, Martin J. Bligh wrote:

> Someone remind me why we can't remove the memlocked pages from the LRU
> again? Apart from needing a refcount of how many times they're memlocked
> (or we just shove them back whenever they're unlocked, and let it fall
> out again when we walk the list, but that doesn't fix the accounting
> problem).

We simply do not unmap memlocked pages (see try_to_unmap). And therefore
they are not reclaimable.

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