[haiku-development] memory page compression

  • From: "Jonas Sundström" <jonas@xxxxxxxxxxx>
  • To: haiku-development@xxxxxxxxxxxxx
  • Date: Wed, 22 Jul 2009 15:12:38 +0200 CEST

Anybody given any thought to compressing memory pages
in RAM as an alternative to, or complementing, a page file?

There seem to be active patents in this area, unfortunately. :/

Lazily searching the web found me these:
(not meant as a comprehensive list)

1997 - (WO/1997/023828) MEMORY PAGE COMPRESSION
http://www.wipo.int/pctdb/en/wo.jsp?wo=1997023828

2003 - US Patent 6516397 - Virtual memory system 
utilizing data compression implemented through a device
http://www.patentstorm.us/patents/6516397/claims.html

2009 - 
http://www.patents.com/Data-compression-supporting-virtual-memory-management-a-demand-paging-system/US7512767/en-US/

How can page compression be such recent invention(s)?
There's got to be prior art.

/Jonas.



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