Re: [PATCH] mm: inactive-clean list

From: Andrew Morton
Date: Tue Jul 18 2006 - 10:25:40 EST

On Tue, 18 Jul 2006 07:03:12 -0700 (PDT)
Christoph Lameter <clameter@xxxxxxx> wrote:

> What other types of non freeable pages could exist?

PageWriteback() pages (potentially all of memory)

Pinned pages (various transient conditions, mainly get_user_pages())

Some pages whose buffers are attached to an ext3 journal.

Possibly NFS unstable pages.
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