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    SubjectRe: [RFC][PATCH] memcg soft limit (yet another new design) v1
    * KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> [2009-03-31 09:06:07]:

    > On Sat, 28 Mar 2009 23:57:47 +0530
    > Balbir Singh <balbir@linux.vnet.ibm.com> wrote:
    >
    > > * Balbir Singh <balbir@linux.vnet.ibm.com> [2009-03-28 23:41:00]:
    > >
    > > > * 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
    > >
    > > I meant to say, Here is what I see with my patches (v7)
    > >
    >
    > your malloc program is like this ?
    >
    > int main(int argc, char *argv[])
    > {
    > c = malloc(1G);
    > memset(c, 0, 1G);
    > getc();
    > }
    >

    Very similar, instead of memset, we go integer by integer and set it
    to 0, do two loops of touching and wait for user input before exiting.


    --
    Balbir


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