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cgroup: Add ManagedOOMMemoryPressureDurationSec= override setting for units

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This will allow units (scopes/slices/services) to override the default
systemd-oomd setting DefaultMemoryPressureDurationSec=.

The semantics of ManagedOOMMemoryPressureDurationSec= are:
- If >= 1 second, overrides DefaultMemoryPressureDurationSec= from oomd.conf
- If is empty, uses DefaultMemoryPressureDurationSec= from oomd.conf
- Ignored if ManagedOOMMemoryPressure= is not "kill"
- Disallowed if < 1 second

Note the corresponding dbus property is DefaultMemoryPressureDurationUSec
which is in microseconds. This is consistent with other time-based
dbus properties.
This commit is contained in:
Ryan Wilson
2024-10-16 20:12:38 -07:00
parent c43ef2e883
commit 63d4c4271c
21 changed files with 293 additions and 21 deletions
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test/fuzz/fuzz-unit-file/directives-all.service
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@@ -154,6 +154,7 @@ MaxConnectionsPerSource=
ManagedOOMSwap=
ManagedOOMMemoryPressure=
ManagedOOMMemoryPressureLimitPercent=
ManagedOOMMemoryPressureDurationSec=
ManagedOOMPreference=
MemoryAccounting=
MemoryHigh=