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Commit 1e111452 authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds
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memcg: update memcg_test.txt to describe memory thresholds 



Decription of sanity check for memory thresholds.

Signed-off-by: default avatarKirill A. Shutemov <kirill@shutemov.name>
Acked-by: default avatarKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Dan Malek <dan@embeddedalley.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 1d8fd973

Documentation/cgroups/memcg_test.txt

+21 −0
Original line number Diff line number Diff line
@@ -396,3 +396,24 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y. 
	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.



 9.10 Memory thresholds

	Memory controler implements memory thresholds using cgroups notification

	API. You can use Documentation/cgroups/cgroup_event_listener.c to test

	it.



	(Shell-A) Create cgroup and run event listener

	# mkdir /cgroup/A

	# ./cgroup_event_listener /cgroup/A/memory.usage_in_bytes 5M



	(Shell-B) Add task to cgroup and try to allocate and free memory

	# echo $$ >/cgroup/A/tasks

	# a="$(dd if=/dev/zero bs=1M count=10)"

	# a=



	You will see message from cgroup_event_listener every time you cross

	the thresholds.



	Use /cgroup/A/memory.memsw.usage_in_bytes to test memsw thresholds.



	It's good idea to test root cgroup as well.