This new major version has two main features: page cache is supported, so from now on all pages from page cache (not only swap cache pages) are compressed; and manual adaptivity is fully implemented. Besides that, this version have shared memory support back, clean pages support in compressed cache, many cleanups, simpler code, much more documented code (mainly vswap) and also a code more rock solid (with allocation failure handling, for instance). Unfortunately the manual adaptivity does not allow us to disable compressed cache, but it's one of our high-priority itens on our todo list.
Details:
http://sourceforge.net/project/shownotes.php?group_id=13472&release_id=79628
Download:
http://prdownloads.sourceforge.net/linuxcompressed/patch-comp-cache-2.4.18-0.22.bz2