[xtables-addons] memory usage in module geoip (probably)

[Marcin Mirosław <marcin@xxxxxxxx>]

Hello!
I've noticed high size of kmalloc-512/2048 on my vps after a one, two
weeks of work. Example:
  OBJS ACTIVE  USE OBJ SIZE  SLABS OBJ/SLAB CACHE SIZE NAME
 83440  83411  99%    0.57K   5960       14     47680K kmalloc-512
 21615  21604  99%    2.07K   1441       15     46112K kmalloc-2048
103776 103765  99%    0.31K   8648       12     34592K skbuff_head_cache

I've done a little investigation (trial by error method) to discover
which process keep data in kmalloc. It looks those kmalloc are used by
modules from xtables-addons-1.39. I'm using ipset6, geoip, sysrq,
tarpit. I greped sources for string "kmalloc", kmalloc is used by sysrq
and geoip (in some other modules too but i don't use them).

I'd like to ask is such usage of memory ok? Which module could take so
much precious ram?:) (I suspect geoip). How much memory geoip can use in
worse case (db with ipv4 and ipv6)? Can i freed this cache without
reboot? (I tried flush rules, rmmod but without succes).

Thank you for any answers!
Marcin

P.S. Is any other method to check which process/module/etc uses kmallocs?
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