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| author | Kirill A. Shutemov <kirill@shutemov.name> | 2010-03-11 02:22:36 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-13 02:52:38 +0300 |
| commit | 1e111452d457ceedec8a57fc3d45b1312e736fba (patch) | |
| tree | 6d1babdeb8fbe3c43be0b7367df51d2cc902be3e /Documentation | |
| parent | 1d8fd973a41942bc760dd21581e24117bc1dd063 (diff) | |
| download | linux-1e111452d457ceedec8a57fc3d45b1312e736fba.tar.xz | |
memcg: update memcg_test.txt to describe memory thresholds
Decription of sanity check for memory thresholds.
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Acked-by: KAMEZAWA 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/cgroups/memcg_test.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt index e01148886b5b..4d32e0ed1917 100644 --- a/Documentation/cgroups/memcg_test.txt +++ b/Documentation/cgroups/memcg_test.txt @@ -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. |