On Wed, Jun 01, 2016 at 10:07:07AM +0900, Sergey Senozhatsky wrote: > Hello Minchan, > > On (06/01/16 09:03), Minchan Kim wrote: > [..] > > So, if we do 'cat /sys/block/zram0/comp_algorithm", every crypto modules > > in the backend array are loaded in memory and not unloaded until admin > > executes rmmod? Right? > > yes, I think so.
It scares me. Common case, except one we choosed, every loaded modules will be not used. I think it's really not good. Although the wastage might be not big now, it will be heavy as crypto comp modules are increased. What do you think about it? > > [..] > > If user load out-of-tree crypto compression module, what's status of > > comp_algorithm? > > > > #> insmod foo_crypto.ko > > #> echo foo > /sys/block/zram0/comp_algorithm > > #> cat /sys/block/zram0/comp_algorithm > > lzo lz4 [foo] > > ? > > yes, "lzo lz4 [out-of-tree-module-name]". Makes sense!
