Module fsops 

Filesystem helpers that are not on the per-tick hot path.

smaps_rollup is expensive (the kernel walks every VMA), so it is fetched only when a PSS/EPSS column is visible, and always through this module so the call site stays obvious.

Structs

CgroupEntry

A cgroup membership entry from /proc/<pid>/cgroup.

Container

What a cgroup path says about the process’s container membership.

SmapsRollup

Memory figures from /proc/<pid>/smaps_rollup, in bytes.

Functions

container_from_cgroup

Best-effort container detection from cgroup membership.

container_from_path

Classify one cgroup path.

in_different_pid_namespace

Whether pid lives in a different PID namespace than the caller.

parse_cgroup

Parse /proc/<pid>/cgroup.

parse_smaps_rollup

Parse /proc/<pid>/smaps_rollup.

preferred_path

Choose which cgroup path to display when /proc/<pid>/cgroup lists several.

read_smaps_rollup

Read and parse /proc/<pid>/smaps_rollup.

self_pid_namespace

The PID namespace inode of the running process, i.e. gander’s own.

smaps_rollup_available

Whether /proc/<pid>/smaps_rollup exists for this pid.