On Monday 13 June 2011 16:40:48 you wrote:
> Is it reproducible without zcache?

I don't know how to check cleancache without zcache; cleancache itself doesn't 
do anything unless it has some backend configured, and zcache is the only 
backend I know of and can use.


To enable zcache you need to have one `zcache' argument in kernel's command 
line.
 

There's an outstanding bug in zcache's build system:
http://code.google.com/p/compcache/issues/detail?id=91

In short, core part of zcache may end up not being compiled at all ;-(

To build zcache in 3.0-rc2, you need to hack it a bit with the attach'd patch. 
Basically it renames the `zcache.c' to `zcache-core.c' and updates Makefile.


To verify zcache is enabled, look through dmesg for two lines like:
> zcache: cleancache enabled using kernel transcendent memory and compression 
buddies
>zcache: created ephemeral tmem pool, id=0


-- 
dexen deVries

``One can't proceed from the informal to the formal by formal means.''