A new patch is out. If no major problem shows up, it will become 0.23 final. It features support for storing pages with buffers in compressed cache, which will avoid part of disk IO we were doing due to the pressure on the uncompressed cache. That feature turns the space reserved for compressed cache into an useful space for pages with buffers too, in spite of not compressing this kind of pages. More details in the link below.
Notes:
http://sourceforge.net/project/shownotes.php?release_id=50313
Download (not a direct link)
http://prdownloads.sourceforge.net/linuxcompressed/patch-comp-cache-2.4.18-0.23pre6.bz2?download
Download (direct link)
http://west.dl.sourceforge.net/sourceforge/linuxcompressed/patch-comp-cache-2.4.18-0.23pre6.bz2