Module cell_manager 

Cell manager for userspace-driven cell creation.

This module implements the --cell-parent-cgroup mode where cells are created for direct child cgroups of a specified parent. Uses inotify to watch for cgroup creation/destruction and manages cell ID allocation.

Re-exports

use std::collections::BTreeMap; 🔒

use std::collections::BTreeSet; 🔒

use std::collections::HashMap; 🔒

use std::collections::HashSet; 🔒

use std::fs::DirEntry; 🔒

use std::os::unix::fs::MetadataExt; 🔒

use std::os::unix::io::AsFd; 🔒

use std::os::unix::io::BorrowedFd; 🔒

use std::path::Path; 🔒

use std::path::PathBuf; 🔒

use std::sync::atomic::AtomicBool; 🔒

use std::sync::atomic::Ordering; 🔒

use anyhow::Context; 🔒

use anyhow::Result; 🔒

use anyhow::bail; 🔒

use inotify::Inotify; 🔒

use inotify::WatchMask; 🔒

use scx_utils::Cpumask; 🔒

use tracing::debug; 🔒

use tracing::info; 🔒

Structs

CellInfo

Information about a cell created for a cgroup

CellManager

Manages cells for direct child cgroups of a specified parent

CpuAssignment

Result of CPU assignment computation, containing both primary and optional borrowable masks.

CpuManager 🔒

Generic CPU allocator over a fixed domain of CPUs.

CpuMinimum 🔒

Minimum primary-CPU constraints for a partitioning recipient.

CpuRecipient 🔒

Generic allocation input for a CPU partitioning recipient.

Functions

add_cpus_to_assignment 🔒

Add cpus to recipient id’s mask in assignments.

assign_partition_chunks 🔒

Place the per-recipient CPU counts onto domain by partition chunk. The recipient with the most CPUs left takes the largest chunk that still fits, so each recipient collects whole partitions first; whatever counts remain are carved contiguously from the chunks nobody could take whole. counts must sum to the domain size.

cgroup_root_relative 🔒

Strip the cgroup mount prefix from a stored cell path, yielding the root-relative cgroup path (e.g. /sys/fs/cgroup/a/b -> /a/b).

partition_chunks 🔒

Group the CPUs of domain into chunks by partition (LLC), ordered by partition id. CPUs without a partition become one-CPU chunks at the end.

read_dir_sorted 🔒