Re: [RFC][PATCH 0/1] Node-based reclaim/migration

Christoph Lameter
2006-11-30T18:28:10Z

On Thu, 30 Nov 2006, Paul Menage wrote:

> OK, so we could do the same, and just assume that pages with a
> page_mapcount() of 0 are either about to be freed or can be picked up
> on a later migration sweep. Is it common for a page to have a 0
> page_mapcount() for a long period of time without being freed or
> remapped?

page mapcount goes to zero during migration because the references to the
page are removed.