Re: Active Memory Defragmentation: Our implementation & problems

[IWAMOTO Toshihiro <iwamoto _at_ xxxxxxxxxxxxx>]

At 03 Feb 2004 21:54:34 -0800,
Dave Hansen wrote:
> Moving file-backed pages is mostly handled already.  You can do a
> regular page-cache lookup with find_get_page(), make your copy,
> invalidate the old one, then readd the new one.  The invalidation can be
> done in the same style as shrink_list().

Actually, it is a bit more complicated.
I have implemented similar functionality for memory hotremoval.

See my post about memory hotremoval
http://marc.theaimsgroup.com/?l=linux-kernel&m=107354781130941&w=2
for details.
remap_onepage() and remapd() in the patch are the main functions.

--
IWAMOTO Toshihiro

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