* nishimura@xxxxxxxxxxxxxxxxx <nishimura@xxxxxxxxxxxxxxxxx> [2010-02-15 09:49:13]: > Update memcg_test.txt to describe how to test the move-charge feature. > > Signed-off-by: Daisuke Nishimura <nishimura@xxxxxxxxxxxxxxxxx> > --- > Documentation/cgroups/memcg_test.txt | 22 ++++++++++++++++++++-- > 1 files changed, 20 insertions(+), 2 deletions(-) > > diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt > index 72db89e..e011488 100644 > --- a/Documentation/cgroups/memcg_test.txt > +++ b/Documentation/cgroups/memcg_test.txt > @@ -1,6 +1,6 @@ > Memory Resource Controller(Memcg) Implementation Memo. > -Last Updated: 2009/1/20 > -Base Kernel Version: based on 2.6.29-rc2. > +Last Updated: 2010/2 > +Base Kernel Version: based on 2.6.33-rc7-mm(candidate for 34). > > Because VM is getting complex (one of reasons is memcg...), memcg's behavior > is complex. This is a document for memcg's internal behavior. > @@ -378,3 +378,21 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y. > #echo 50M > memory.limit_in_bytes > #echo 50M > memory.memsw.limit_in_bytes > run 51M of malloc > + > + 9.9 Move charges at task migration > + Charges associated with a task can be moved along with task migration. > + > + (Shell-A) > + #mkdir /cgroup/A > + #echo $$ >/cgroup/A/tasks > + run some programs which uses some amount of memory in /cgroup/A. > + > + (Shell-B) > + #mkdir /cgroup/B > + #echo 1 >/cgroup/B/memory.move_charge_at_immigrate > + #echo "pid of the program running in group A" >/cgroup/B/tasks > + > + You can see charges have been moved by reading *.usage_in_bytes or > + memory.stat of both A and B. > + See 8.2 of Documentation/cgroups/memory.txt to see what value should be > + written to move_charge_at_immigrate. Looks good to me, I would also try and ping pong task migration with move_charges_at_immigrate enabled and check for stability as well. Acked-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx> -- Three Cheers, Balbir -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>