net/sched/sch_pie.c

File Facts

System

Linux kernel

Corpus path

net/sched/sch_pie.c

Extension

.c

Size

15978 bytes

Lines

584

Domain

Networking Core

Bucket

Sockets, Protocols, Packet Path, And Network Policy

Inferred role

Networking Core: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.

• Networking stack implementation surface: socket APIs, protocol dispatch, packet flow, routing, filtering, and network namespaces.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/slab.h
• linux/types.h
• linux/kernel.h
• linux/errno.h
• linux/skbuff.h
• net/pkt_sched.h
• net/inet_ecn.h
• net/pie.h

Detected Declarations

• struct pie_sched_data
• function pie_drop_early
• function pie_qdisc_enqueue
• function INET_ECN_set_ce
• function pie_change
• function pie_process_dequeue
• function up
• function pie_calculate_probability
• function pie_timer
• function pie_init
• function pie_dump
• function pie_dump_stats
• function pie_reset
• function pie_destroy
• function pie_module_init
• function pie_module_exit
• module init pie_module_init
• export pie_drop_early
• export pie_process_dequeue
• export pie_calculate_probability

Annotated Snippet

module_init(pie_module_init);
module_exit(pie_module_exit);

MODULE_DESCRIPTION("Proportional Integral controller Enhanced (PIE) scheduler");
MODULE_AUTHOR("Vijay Subramanian");
MODULE_AUTHOR("Mythili Prabhu");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/slab.h`, `linux/types.h`, `linux/kernel.h`, `linux/errno.h`, `linux/skbuff.h`, `net/pkt_sched.h`, `net/inet_ecn.h`.
• Detected declarations: `struct pie_sched_data`, `function pie_drop_early`, `function pie_qdisc_enqueue`, `function INET_ECN_set_ce`, `function pie_change`, `function pie_process_dequeue`, `function up`, `function pie_calculate_probability`, `function pie_timer`, `function pie_init`.
• Atlas domain: Networking Core / Sockets, Protocols, Packet Path, And Network Policy.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.