Quoting Jäkel, Guido ([email protected]):
> Dear Anthony, Dear Fajar,
> 
> On may unit letters like 'G' while setting the values of the memory cgroup 
> controller.
> 
> But note that  memsw  stands for  the sum of  memory and swap. Therefore, 
> can't set  memory.memsw.limit_in_bytes   to a value *lower* than the actual 
> value of  memory.limit_in_bytes. In the other hand, you can't set  
> memory.limit_in_bytes  to a value *greater* than the actual value of  
> memory.memsw.limit_in_bytes.
> 
> Because the default is "unlimited", you first have to lower the value for 
> memory before you be able to lower the memsw value.
> 
> To my opinion this is no good interface design, but unfortunately that's the 
> current state. Maybe we should send a patch upstream, to automatically rise  
> memsw if  mem  should be set to a value greater than memsw and by the other 
> hand lower  mem, if  memsw should be set below mem.

Might be worth having lxc order the rules so that it'll always just work.
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