Re: [dpdk-dev] RTE Ring removing

[Igor Ryzhov <iryzhov@arccn.ru>]

Hello again.

I did some investigation on the code.
I learned that RTE Ring creation function uses functions related to RTE 
Memzone to reserve memory (rte_memzone_reserve).
Documentation states that once reserved memzone can not be unreserved. I 
decided to find out why it is so.

I noticed that in Memzone realization there is a special global variable 
"free_memseg" containing pointers on free memory segments.
An memzone reserve function just finst the best segment for allocation 
from this "free_memseg" variable.

So I think there is a possibility to unreserve already reserved memory 
back to "free_memseg", and impossibility of unreserving memory is just 
because there is no function for that, not because it is impossible in 
principle.
Am I right? Or there are any restrictions?

Best regards,
Igor Ryzhov

06.05.2014 13:05, Igor Ryzhov пишет:
> Hello.
>
> For what reason RTE Rings can not be removed once created?
> In my application I want to use many rings with different names so I 
> think there may be a problem with memory because of many ring that 
> already not in use, but allocated.
> Or DPDK has a mechanism of reusing memory if rings are not in use?
>
> Best regards,
> Igor Ryzhov