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author | Chris Zankel <chris@zankel.net> | 2009-04-03 05:29:05 -0400 |
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committer | Chris Zankel <chris@zankel.net> | 2009-04-03 05:29:05 -0400 |
commit | 65127d28e312bb6b38ce84a7bb71d762ef63ad4c (patch) | |
tree | d5fdf52a2d0731f7fab0ce0ed394faac50b04fbc /Documentation/cgroups/memcg_test.txt | |
parent | b8bb76713ec50df2f11efee386e16f93d51e1076 (diff) | |
parent | 8fe74cf053de7ad2124a894996f84fa890a81093 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into merge
Diffstat (limited to 'Documentation/cgroups/memcg_test.txt')
-rw-r--r-- | Documentation/cgroups/memcg_test.txt | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/Documentation/cgroups/memcg_test.txt b/Documentation/cgroups/memcg_test.txt index 523a9c16c400..8a11caf417a0 100644 --- a/Documentation/cgroups/memcg_test.txt +++ b/Documentation/cgroups/memcg_test.txt | |||
@@ -1,5 +1,5 @@ | |||
1 | Memory Resource Controller(Memcg) Implementation Memo. | 1 | Memory Resource Controller(Memcg) Implementation Memo. |
2 | Last Updated: 2009/1/19 | 2 | Last Updated: 2009/1/20 |
3 | Base Kernel Version: based on 2.6.29-rc2. | 3 | Base Kernel Version: based on 2.6.29-rc2. |
4 | 4 | ||
5 | Because VM is getting complex (one of reasons is memcg...), memcg's behavior | 5 | Because VM is getting complex (one of reasons is memcg...), memcg's behavior |
@@ -360,3 +360,21 @@ Under below explanation, we assume CONFIG_MEM_RES_CTRL_SWAP=y. | |||
360 | # kill malloc task. | 360 | # kill malloc task. |
361 | 361 | ||
362 | Of course, tmpfs v.s. swapoff test should be tested, too. | 362 | Of course, tmpfs v.s. swapoff test should be tested, too. |
363 | |||
364 | 9.8 OOM-Killer | ||
365 | Out-of-memory caused by memcg's limit will kill tasks under | ||
366 | the memcg. When hierarchy is used, a task under hierarchy | ||
367 | will be killed by the kernel. | ||
368 | In this case, panic_on_oom shouldn't be invoked and tasks | ||
369 | in other groups shouldn't be killed. | ||
370 | |||
371 | It's not difficult to cause OOM under memcg as following. | ||
372 | Case A) when you can swapoff | ||
373 | #swapoff -a | ||
374 | #echo 50M > /memory.limit_in_bytes | ||
375 | run 51M of malloc | ||
376 | |||
377 | Case B) when you use mem+swap limitation. | ||
378 | #echo 50M > memory.limit_in_bytes | ||
379 | #echo 50M > memory.memsw.limit_in_bytes | ||
380 | run 51M of malloc | ||