Am 19.11.2012 18:51, schrieb Kerin Millar:
> Florian Philipp wrote:
>> Hi list!
>>
>> I'm wondering about the usage of frontswap and cleancache. Now that all
>> pieces are in place in kernel-3.5, is it actually used?
>>
>> I've found references to cleancache and frontswap in several source
>> files of the kernel (ext4, swapfile, page_io, ...).
>> /sys/kernel/mm/zcache is also present but seems to indicate no usage at
>> all. Content attached below.
> 
> It might be that you have enabled some of these options as loadable
> modules: CONFIG_ZCACHE, CONFIG_CLEANCACHE and CONFIG_FRONTSWAP. If so,
> build them directly into the kernel image instead.
> 
> Cheers,
> 
> --Kerin
> 

You cannot build these as modules. Anyway, I'm recompiling right now
with debugfs and configfs. Let's see if that tells me anything.

Regards,
Florian Philipp