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Add the swapMemorySupport requirement to OOM tests

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Add the swapMemorySupport requirement to all tests related to the OOM killer.  The --memory option has the subtle side effect of defaulting --memory-swap to double the value of --memory.  The OOM killer doesn't kick in until the container exhausts memory+swap, and so without the memory swap cgroup the tests will timeout due to swap being effectively unlimited.

Document the default behavior of --memory-swap in the docker run man page.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
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Sean Christopherson 2016-05-10 09:58:55 -07:00 committed by Tibor Vass
parent 0d227954c5
commit ab42b091ee
1 changed files with 2 additions and 1 deletions
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man/docker-run.1.md
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@ -353,7 +353,8 @@ as memory limit.
**--memory-swap**="LIMIT" **--memory-swap**="LIMIT"
A limit value equal to memory plus swap. Must be used with the **-m** A limit value equal to memory plus swap. Must be used with the **-m**
(**--memory**) flag. The swap `LIMIT` should always be larger than **-m** (**--memory**) flag. The swap `LIMIT` should always be larger than **-m**
(**--memory**) value. (**--memory**) value. By default, the swap `LIMIT` will be set to double
the value of --memory.
The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes), The format of `LIMIT` is `<number>[<unit>]`. Unit can be `b` (bytes),
`k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you don't specify a `k` (kilobytes), `m` (megabytes), or `g` (gigabytes). If you don't specify a