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SubjectRe: [RFC][PATCH] memcg soft limit (yet another new design) v1
* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-03-27 13:59:33]:

> ==brief test result==
> On 2CPU/1.6GB bytes machine. create group A and B
> A. soft limit=300M
> B. no soft limit
>
> Run a malloc() program on B and allcoate 1G of memory. The program just
> sleeps after allocating memory and no memory refernce after it.
> Run make -j 6 and compile the kernel.
>
> When vm.swappiness = 60 => 60MB of memory are swapped out from B.
> When vm.swappiness = 10 => 1MB of memory are swapped out from B
>
> If no soft limit, 350MB of swap out will happen from B.(swapiness=60)
>

I ran the same tests, booted the machine with mem=1700M and maxcpus=2

Here is what I see with

A has a swapout of 344M and B has not swapout at all, since B is
always under its soft limit. vm.swappiness is set to 60

I think the above is more along the lines of the expected functional behaviour.

--
Balbir


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