• Giuseppe Scrivano's avatar
    mm: hugetlb controller for cgroups v2 · faced7e0
    Giuseppe Scrivano authored
    In the effort of supporting cgroups v2 into Kubernetes, I stumped on
    the lack of the hugetlb controller.
    When the controller is enabled, it exposes four new files for each
    hugetlb size on non-root cgroups:
    - hugetlb.<hugepagesize>.current
    - hugetlb.<hugepagesize>.max
    - hugetlb.<hugepagesize>.events
    - hugetlb.<hugepagesize>.events.local
    The differences with the legacy hierarchy are in the file names and
    using the value "max" instead of "-1" to disable a limit.
    The file .limit_in_bytes is renamed to .max.
    The file .usage_in_bytes is renamed to .current.
    .failcnt is not provided as a single file anymore, but its value can
    be read through the new flat-keyed files .events and .events.local,
    through the "max" key.
    Signed-off-by: default avatarGiuseppe Scrivano <gscrivan@redhat.com>
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
hugetlb.h 20.8 KB