Am 19.11.2012 21:06, schrieb Kerin Millar: > Florian Philipp wrote: >> 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 >> > > Ah, good to know. I know that it was possible in some older kernels - > while the feature was still in staging - but it must have since been fixed. > > --Kerin >
Okay, fixed my issue. Turns out, you need to add a "zcache" kernel parameter. Too bad there is no doc on this parameter. Regards, Florian Philipp
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