v7.2 kernel8 subsystems

Kernel Subsystems

Deep-dive reference pages for every major Linux 7.2 subsystem — annotated source, interactive diagrams, and key data structures.

8Subsystems

20+Diagrams

150+Key structs

// all subsystems

[mm]

● live

Memory Management

Virtual memory, page allocator, slab/slub, NUMA, huge pages, and OOM killer internals.

Virtual memory layoutBuddy allocatorPage fault handlerSLUB allocatorNUMA balancingOOM killer

mm_structvm_area_structpagepgd_t

mm/

[sched]

soon

Process Scheduler

CFS, real-time scheduling classes, load balancing, and runqueue architecture.

CFS red-black treevruntime accountingRT schedulingLoad balancingCPU affinityDeadline scheduler

task_structsched_entityrqcfs_rq

kernel/sched/

[vfs]

soon

Virtual File System

VFS layer, dentry/inode caches, file operations, and filesystem registration.

Dentry cacheInode lifecycleFile operationsFilesystem registrationPage cacheWriteback

inodedentryfilesuper_block

fs/

[net]

soon

Network Stack

Socket layer, TCP/IP implementation, netfilter, and packet processing pipeline.

Socket APITCP state machinesk_buff lifecycleNetfilter hooksNAPI pollingXDP

socksk_buffnet_devicetcp_sock

net/

[drivers]

soon

Device Drivers

Driver model, kobject hierarchy, platform devices, and interrupt handling.

Driver modelkobject/ksetPlatform devicesIRQ handlingDMA mappingPower management

devicedriverkobjectplatform_device

drivers/

[syscall]

soon

System Calls

Syscall table, entry path, VDSO, seccomp, and audit framework.

SYSCALL instructionentry_SYSCALL_64sys_call_tableseccomp BPFVDSOAudit framework

pt_regsseccomp_filteraudit_contextlinux_binprm

arch/x86/entry/

[ipc]

soon

IPC & Signals

Signals, pipes, POSIX message queues, shared memory, and semaphores.

Signal deliveryPipe internalsPOSIX MQSysV shared memoryFutexSemaphores

sigactionpipe_inode_infomqueue_inode_infoshmid_kernel

ipc/

[block]

soon

Block Layer

Block I/O stack, request queues, I/O schedulers, and multi-queue architecture.

bio / request lifecycleblk-mqI/O schedulersDevice mapperNVMe driverWriteback throttling

biorequestgendiskblk_mq_hw_ctx

block/

Kernel subsystem dependency map

all diagrams →

// related tutorials

[syscall]Syscall Entry Path

INTERMEDIATE→

[mm]Page Fault Walkthrough

INTERMEDIATE→

View all tutorials →