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  1. JDK
  2. JDK-8253714

[cgroups v2] Soft memory limit incorrectly using memory.high

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    • b18
    • generic
    • linux

    Backports

      Description

        As per [1] and [2] the crun OCI runtime supporting cgroups v2 maps --memory-reservation to memory.low. The OpenJDK code still uses memory.high which was a bug in crun fixed in crun 0.11 and better:

        $ grep -rn memory\.high src/hotspot/os/linux/
        src/hotspot/os/linux/cgroupV2Subsystem_linux.cpp:152: GET_CONTAINER_INFO_CPTR(cptr, _unified, "/memory.high",
        $ grep -rn memory\.high src/java.base/linux/classes/jdk/internal/platform/
        src/java.base/linux/classes/jdk/internal/platform/cgroupv2/CgroupV2Subsystem.java:290: String softLimitStr = CgroupSubsystemController.getStringValue(unified, "memory.high");

        This manifests in failing container tests on systems supporting cgroup v2 and having the fixed crun runtime, like Fedora 32.

        [1] https://bugzilla.redhat.com/show_bug.cgi?id=1880452
        [2] https://github.com/containers/crun/blob/master/crun.1.md#cgroup-v2

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            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8254149 [cgroups v2] Soft memory limit incorrectly using memory.high

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8283567 [cgroups v2] Soft memory limit incorrectly using memory.high

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8285291 [cgroups v2] Soft memory limit incorrectly using memory.high

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8295081 [cgroups v2] Soft memory limit incorrectly using memory.high

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8298238 [cgroups v2] Soft memory limit incorrectly using memory.high

            • P3 - Major loss of function.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8253727 [cgroups v2] Memory and swap limits reported incorrectly

            • P3 - Major loss of function.
            • Resolved

            Enhancement - null JDK-8230305 Cgroups v2: Container awareness

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            links to

            Commit Commit openjdk/jdk8u-dev/633acfab

            Commit Commit openjdk/jdk11u-dev/f76091ec

            Commit Commit openjdk/jdk/ff6843ca

            Review Review openjdk/jdk8u-dev/130

            Review Review openjdk/jdk11u-dev/865

            Review Review openjdk/jdk11u-dev/941

            Review Review openjdk/jdk/381

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                sgehwolf Severin Gehwolf
                sgehwolf Severin Gehwolf
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