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balloons: add warning to PinMemory option documentation #933

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merged 1 commit into from Nov 28, 2022
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balloons: add warning to PinMemory option documentation #933

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7 changes: 5 additions & 2 deletions docs/policy/balloons.md
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Expand Up @@ -66,8 +66,11 @@ Balloons policy parameters:
- `PinCPU` controls pinning a container to CPUs of its balloon. The
default is `true`: the container cannot use other CPUs.
- `PinMemory` controls pinning a container to the memories that are
closest to the CPUs of its balloon. Pinning memory disallows using
memory from other NUMA nodes.
closest to the CPUs of its balloon. The default is `true`: allow
using memory only from the closest NUMA nodes. Warning: this may
cause kernel to kill workloads due to out-of-memory error when
closest NUMA nodes do not have enough memory. In this situation
consider switching this option `false`.
- `IdleCPUClass` specifies the CPU class of those CPUs that do not
belong to any balloon.
- `ReservedPoolNamespaces` is a list of namespaces (wildcards allowed)
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