Linux kernel

Last build

📌 Project Architecture & CI/CD Workflow

graph TD
    subgraph Job1["🔍 1. Prepare Environment (Debian Container)"]
        A1["📦 Kernel Source<br/>(kernel.org / Git Tag)"] --> A3["🔧 make olddefconfig<br/>(+ Optional Patch)"]
        A2["📄 Kconfig<br/>(configs/ or Remote)"] --> A3
        A3 --> A4["📤 Upload Source Artifact"]
    end

    subgraph Job2["🐧 2. Build Kernel & Release (Debian Container)"]
        B1["📥 Download Source Artifact"] --> B2["🐧 make bindeb-pkg<br/>(KCFLAGS='-march=znver3')"]
        B2 --> B3["📦 Debian .deb Packages<br/>(headers, image, dbg, libc-dev)"]
        B3 --> B4["🚀 GitHub Release"]
    end

    subgraph Job3["📤 3. Telegram Notification"]
        C1["📲 Send Status &<br/>Logs to Telegram"]
    end

    Job1 --> Job2
    Job2 --> Job3
    B4 -->|"💻 sudo apt install ./linux-*.deb"| D["🖥️ Workstation<br/>"]

    style Job1 fill:#1a202c,stroke:#319795,color:#fff
    style Job2 fill:#1a202c,stroke:#2b6cb0,color:#fff
    style Job3 fill:#1a202c,stroke:#805ad5,color:#fff
    style D fill:#dd6b20,stroke:#ed8936,color:#fff

⚡ Kernel Customization & Performance

Subsystem	Configuration / Option	Engineering Rationale
Target Architecture	`-march=znver3` (`CONFIG_X86_NATIVE_CPU=y`)	Native AVX2/BMI2 instruction optimization for AMD Zen 3 microarchitecture.
Scheduler & Preemption	`PREEMPT_BUILD` / `PREEMPT=y`	Full kernel preemption for minimal input and audio processing latency.
Timer Frequency	`1000 Hz` (`CONFIG_HZ_1000=y`)	High-resolution tick frequency for desktop responsiveness and frame pacing.
Tickless Kernel	`NO_HZ_FULL=y`	Adaptive tickless kernel to eliminate periodic timer interrupts on heavy workloads.
CPU Core Sizing	`CONFIG_NR_CPUS=32`	Hardcapped to 32 threads matching Ryzen 9 5950X, eliminating virtual CPU overhead.
CPU Frequency Scaling	`amd-pstate` EPP (`CONFIG_X86_AMD_PSTATE=y`)	Hardware CPPC microsecond-level core frequency and voltage adjustments.
NUMA Balancing	`# CONFIG_NUMA_BALANCING is not set`	Disabled NUMA balancing to eliminate periodic cross-node scan overhead on 1-NUMA Ryzen CPUs.
Core Scheduling	`CONFIG_SCHED_CORE=y`	SMT thread isolation and core scheduling for security and hyperthreading performance.
RCU Optimization	`CONFIG_RCU_BOOST=y` / `CONFIG_RCU_NOCB_CPU=y`	RCU callback offloading and boosting to eliminate desktop micro-stuttering.
TCP Congestion	TCP BBR (`CONFIG_DEFAULT_TCP_CONG="bbr"`)	Bottleneck bandwidth RTT pacing algorithm to prevent bufferbloat and latency spikes.
eBPF JIT Compiler	`CONFIG_BPF_JIT=y` / `ALWAYS_ON`	Locked-on JIT compiler for zero-overhead packet filtering and eBPF execution.
eBPF Security (LSM)	`CONFIG_BPF_LSM=y`	In-kernel eBPF Linux Security Module for granular, high-performance security hooks.
eBPF BTF Type Format	`CONFIG_DEBUG_INFO_BTF=y`	Pahole split-BTF typeinfo generation for vmlinux and modules (`BTF_MODULES=y`) for eBPF tracing tools.
Async Socket I/O	`IO_URING_ZCRX=y`	Zero-copy packet reception for ultra-fast network socket I/O.
GPU Driver & Display	`amdgpu` + Display Core `DCN 3.0`	Native RDNA 2 support, Resizable BAR (ReBAR), and OverDrive power limit unlocking.
GPU ROCm Compute	`CONFIG_HSA_AMD=y` / `USERPTR=y`	Native AMD KFD driver for ROCm, OpenCL 3.0, and direct GPU user-pointer memory access.
PlayStation Gamepads	`CONFIG_HID_PLAYSTATION=m` / `FF=y`	Sony DualSense (PS5) & DualShock 4 (PS4) controller support with haptic Force Feedback.
Legacy Radeon Removal	`# CONFIG_DRM_RADEON is not set`	Legacy Radeon DRM driver disabled to ensure exclusive `amdgpu` driver stack execution.
AMD IOMMU Isolation	`CONFIG_AMD_IOMMU=y` (`# INTEL_IOMMU`)	Native AMD Vi IOMMU enabled while stripping unused Intel DMAR overhead.
Memory / Zswap	`zswap` + `lzo` (`CONFIG_ZSWAP=y`)	In-RAM compressed swap cache matching kernel boot parameters (`zswap.compressor=lzo`).
Hugepages & Compaction	`THP MADVISE` + `COMPACTION=y`	Transparent Hugepages THP default set to `madvise` to avoid memory bloat with opt-in THP for games/VMs.
Hung Task Diagnostics	`CONFIG_DETECT_HUNG_TASK=y` (120s)	Automatic detection and logging of blocked or hanging kernel threads.
Stack Unwinder	`UNWINDER_ORC=y`	Low-overhead ORC call stack unwinding for precise ftrace kernel profiling.
Hi-Res Audio Driver	`snd_ca0132` (Sound Core3D)	Dedicated ALSA sound driver configured for 32-bit / 192 kHz high-resolution audio.
Bloat Trimming	Disabled unused CPU/GPU/Drivers	Removed Intel/Nvidia drivers, legacy AMD SI/CIK, and unused network vendors.

🛠️ Custom Kernel Optimizations & Performance Features (config-6.19.14-debian13)

This custom kernel build and CI/CD pipeline are specifically tuned for maximum performance, minimal latency, and zero bloat on AMD Ryzen 9 5950X (Zen 3) and AMD Radeon RX 6950 XT (RDNA 2) hardware running on Debian 13.

🧹 1. Hardware Trimming & Bloat Elimination

Non-AMD CPU Support Removed: Disabled Intel, Hygon, Centaur, and Zhaoxin CPU support (# CONFIG_CPU_SUP_INTEL is not set, etc.) to streamline kernel execution paths.
Unused GPU Drivers Removed: Disabled Intel i915 (# CONFIG_DRM_I915 is not set) and Nvidia Nouveau (# CONFIG_DRM_NOUVEAU is not set).
Legacy AMDGPU Generations Removed: Disabled legacy Southern Islands (SI) and Sea Islands (CIK) support (# CONFIG_DRM_AMDGPU_SI is not set, # CONFIG_DRM_AMDGPU_CIK is not set), eliminating si_support / cik_support parameter warnings in dmesg.
Targeted Wireless & Network Drivers: Kept strictly iwlwifi (Intel AX210) and igb (Intel I211), stripping unnecessary Realtek, Broadcom, Atheros, and Ralink wireless/ethernet drivers.
AMD IOMMU Isolation: Native AMD Vi IOMMU driver enabled (CONFIG_AMD_IOMMU=y), while disabling unused Intel DMAR overhead (# CONFIG_INTEL_IOMMU is not set).
Legacy Radeon Driver Disabled: Legacy Radeon DRM driver disabled (# CONFIG_DRM_RADEON is not set), ensuring exclusive amdgpu driver stack execution.
Legacy Controllers Disabled: Removed floppy, parallel ports (PARPORT), PCMCIA/CardBus, FireWire (IEEE1394), ISDN, and analog modems.
DVB & TV Capture Removal: Disabled DVB digital/analog TV, SDR radio, and PCI capture cards (# CONFIG_DVB_CORE is not set, # CONFIG_MEDIA_PCI_SUPPORT is not set), while preserving USB webcam support (CONFIG_USB_VIDEO_CLASS=m).

⏱️ 2. Low-Latency Tuning (Gaming & High-Res Audio)

Full Preemption: Full preemptible kernel (CONFIG_PREEMPT_BUILD=y, CONFIG_PREEMPT=y) for immediate task response and minimal audio/input latency.
Timer Frequency (1000 Hz): Set timer frequency to 1000 Hz (CONFIG_HZ_1000=y, CONFIG_HZ=1000) for precise event timing.
Tickless Full (NO_HZ_FULL): Adaptive tickless kernel (CONFIG_NO_HZ_FULL=y) preventing periodic timer interrupts on heavy workloads and gaming threads.
RCU Prioritization: RCU boosting (CONFIG_RCU_BOOST=y) and offloading (CONFIG_RCU_NOCB_CPU=y) to eliminate micro-stuttering.
Hi-Res Audio Driver: Dedicated Sound Blaster Z ALSA driver (snd_ca0132 / Sound Core3D) configured for 32-bit / 192 kHz low-jitter audio.
PlayStation DualSense & DualShock 4: Dedicated Sony PlayStation HID driver (CONFIG_HID_PLAYSTATION=m, CONFIG_PLAYSTATION_FF=y) with full haptic Force Feedback for PS4/PS5 gamepads over USB and Bluetooth.

🧠 3. CPU Optimizations (AMD Ryzen 9 5950X — 16C / 32T)

Native Architecture Compilation: Target compilation set to Zen 3 (-march=znver3 via KCFLAGS="-march=znver3", CONFIG_X86_NATIVE_CPU=y).
Core Scheduling: Hardware SMT core scheduling enabled (CONFIG_SCHED_CORE=y) for thread isolation, security, and hyperthreading gaming performance.
Sized Core Count: Sized to CONFIG_NR_CPUS=32 matching exact hardware threads, removing virtual CPU overhead.
AMD P-State Driver: Native amd-pstate CPPC driver with EPP enabled (CONFIG_X86_AMD_PSTATE=y, CONFIG_X86_AMD_PSTATE_UT=y) for microsecond-level frequency scaling.
NUMA Balancing Disabled: Disabled automatic NUMA balancing (# CONFIG_NUMA_BALANCING is not set) to eliminate background memory scan overhead on single-node Ryzen CPUs (Modo(s) NUMA: 1).

🎮 4. GPU & Display Core (Radeon RX 6950 XT / Navi 21)

Display Core (DCN 3.0): AMD Display Core enabled (CONFIG_DRM_AMD_DC=y, CONFIG_DRM_AMD_DC_DCN=y) optimized for Navi 21 architecture.
Heterogeneous Compute (ROCm / KFD): AMD HSA kernel driver (CONFIG_HSA_AMD=y) enabled for ROCm, Vulkan, and OpenCL compute.
Direct GPU Memory Access: CONFIG_DRM_AMDGPU_USERPTR=y allowing GPU direct access to user space memory pointers.
Resizable BAR & OverDrive: Full 16 GB VRAM BAR access and OverDrive power limit unlocking (amdgpu.ppfeaturemask=0xffffffff).

🌐 5. Networking & Congestion Control

TCP BBR Default: Configured with TCP BBR as the default congestion control algorithm (CONFIG_DEFAULT_TCP_CONG="bbr", CONFIG_DEFAULT_BBR=y). Eliminates bufferbloat and maximizes bandwidth throughput.
eBPF JIT & LSM: JIT compiler enabled and locked on (CONFIG_BPF_JIT=y, CONFIG_BPF_JIT_ALWAYS_ON=y) alongside eBPF Security Module (CONFIG_BPF_LSM=y) for zero-overhead security hooks.
IO_URING_ZCRX: Zero-copy network reception (CONFIG_IO_URING_ZCRX=y) enabled for ultra-fast socket I/O.

💾 6. Memory Tuning (Zswap `lzo`)

Zswap Storage: Native zswap with lzo compressor (CONFIG_ZSWAP=y, CONFIG_ZSWAP_COMPRESSOR_DEFAULT_LZO=y) matching kernel boot parameters.
Transparent Hugepages (madvise): Set THP default to madvise (CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y) alongside memory compaction (CONFIG_COMPACTION=y) to prevent system-wide memory bloat while enabling 2MB hugepages for opt-in applications (games, emulators, KVM).

🛠️ 7. Diagnostics & CI/CD Pipeline

ORC Unwinder & Hung Task Detection: ORC stack unwinder (CONFIG_UNWINDER_ORC=y) and automatic 120s hung task detection (CONFIG_DETECT_HUNG_TASK=y).
Scheduler & Lock Debugging: Real-time scheduler statistics (CONFIG_SCHEDSTATS=y, CONFIG_SCHED_INFO=y) and lock debugging support (CONFIG_LOCK_DEBUGGING_SUPPORT=y).
Full Tracing Suite: FTRACE infrastructure (CONFIG_FTRACE=y, CONFIG_FUNCTION_TRACER=y, CONFIG_STACK_TRACER=y).
Automated Workflow: GitHub Actions workflow generating .deb packages with explicit -march=znver3 flags and dynamic Git commit changelogs on GitHub Releases.

🔍 Post-Boot Verification & Diagnostic Commands

After booting into the custom kernel, verify active optimizations using the following commands:

Check Active TCP Congestion Control (BBR):

$ sysctl net.ipv4.tcp_congestion_control
net.ipv4.tcp_congestion_control = bbr

Check AMDGPU Driver & OverDrive Status:

$ sudo dmesg | grep -i amdgpu
[    5.839374] amdgpu: Overdrive is enabled...
[    8.098516] amdgpu 0000:0d:00.0: amdgpu: [drm] Display Core v3.2.359 initialized on DCN 3.0

Check AMD P-State Scaling Driver:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
amd-pstate-epp

Check Kernel Preemption Model (Full Preempt):

$ dmesg | grep -i "preempt"
[    0.000000] Dynamic Preempt: full

Check Active Zswap Compressor:

$ cat /sys/module/zswap/parameters/enabled
Y
$ cat /sys/module/zswap/parameters/compressor
lzo

Check eBPF JIT Compiler Status:

$ sysctl net.core.bpf_jit_enable
net.core.bpf_jit_enable = 1

Check ORC Stack Unwinder Status:

$ dmesg | grep -i "ORC"
[    0.000000] ORC unwinder alive

Check CPU Topology & 32-Thread Sizing:

$ lscpu | grep -E "Model name|Thread\(s\) per core|CPU\(s\):"
CPU(s):                32
Thread(s) per core:    2
Model name:            AMD Ryzen 9 5950X 16-Core Processor

Extract Embedded Kernel Configuration from .deb:

$ dpkg-deb --fsys-tarfile linux-image-6.19.14-ryzen9_*.deb | tar -x ./boot/config-6.19.14-ryzen9 -O | grep -E "CONFIG_DEFAULT_TCP_CONG|CONFIG_X86_NATIVE_CPU"
CONFIG_DEFAULT_TCP_CONG="bbr"
CONFIG_X86_NATIVE_CPU=y

Hardware

🐧 Kernel and Toolchain

Element	Value
Kernel	Linux 6.19.14-ryzen9
Model	SMP PREEMPT_DYNAMIC
Base Distribution	Debian 13
Compiler	GCC 14.2.0
Target Architecture	Zen 3
Grub	`GRUB_CMDLINE_LINUX_DEFAULT="quiet amdgpu.ppfeaturemask=0xffffffff zswap.enabled=1 zswap.compressor=lzo"`

📦 Build Dependencies

sudo apt update && sudo apt install -y build-essential gcc-14 g++-14 fakeroot bc bison flex zstd \
  libdw-dev libelf-dev libssl-dev libncurses-dev dwarves debhelper rsync python3 ccache curl jq patch kmod perl mawk tar xz-utils git

Paquete	Versión
`build-essential`	`12.12`
`gcc-14`	`14.2.0-19`
`g++-14`	`14.2.0-19`
`fakeroot`	`1.37.1.1-1`
`bc`	`1.07.1-4`
`bison`	`2:3.8.2+dfsg-1+b2`
`flex`	`2.6.4-8.2+b4`
`zstd`	`1.5.7+dfsg-1`
`libdw-dev`	`0.192-4`
`libelf-dev`	`0.192-4`
`libssl-dev`	`3.5.7-1~deb13u2`
`libncurses-dev`	`6.5+20250216-2`
`dwarves`	`1.30-1`
`debhelper`	`13.24.2`
`rsync`	`3.4.1+ds1-5+deb13u4`
`python3`	`3.13.5-1`
`curl`	`8.14.1-2+deb13u5`
`jq`	`1.7.1-6+deb13u3`
`patch`	`2.8-2`
`kmod`	`34.2-2`
`perl`	`5.40.1-6+deb13u1`
`mawk`	`1.3.4.20250131-1`
`tar`	`1.35+dfsg-3.1`
`xz-utils`	`5.8.1-1+deb13u1`
`git`	`1:2.47.3-0+deb13u1`

🧠 CPU

Component	Details
Architecture	x86_64 `amd64`
Core Architecture	Zen 3
CPU	AMD Ryzen 9 5950X (Vermeer)
Cores / Threads	16 cores / 32 threads
Socket	AM4
Maximum Frequency	~4.9 GHz (boost)
TDP	105W
SMT	Enabled
NUMA	1 node
Virtualization	AMD-V enabled
L1 Cache	512 KiB (16×32 KiB data + 16×32 KiB instruction)
L2 Cache	8 MiB (16×512 KiB)
L3 Cache	64 MiB (2 CCDs)
Instruction Sets	AVX2, FMA, AES-NI, SHA-NI, VAES, BMI1/2

💾 Memory RAM

Parameter	Value
Total Capacity	128 GB
Configuration	4 × 32 GB
Type	DDR4
Speed	3600 MT/s
Channels	Dual Channel
ECC	No
Model	G.Skill F4-3600C18-32GTZN

🎮 GPU

Component	Details
GPU	AMD Radeon RX 6950 XT
Architecture	RDNA 2 (Navi 21)
PCI ID	`1002:73a5`
Kernel Driver	`amdgpu`
DRM/KMS	Enabled

🎮 GPU APIs

API	Version	Device / Driver
AMDGPU	3.64.0	DRM 3.64 kernel driver for NAVI21 (6.19.14-ryzen9)
Vulkan	1.4.305	RADV (Mesa 25.0.7) for AMD Radeon RX 6950 XT
OpenCL	3.0	OpenCL C 1.2 via ROCr / RustiCL / Mesa
OpenGL	4.6	Mesa 25.0.7 (Compatibility Profile, LLVM 19.1.7)
BAR	Enabled	Runtime Detection: `VRAM RAM=16368M, BAR=16384M (Resizable BAR Enabled)`

🧩 Motherboard

Component	Details
Motherboard	Gigabyte X570 AORUS ELITE (rev. 1.0)
Chipset	AMD X570
Manufacturer	Gigabyte Technology Co., Ltd.
BIOS	AMI (American Megatrends)
BIOS Version	F40
BIOS Date	2025-10-29
Boot Mode	UEFI
SMBIOS	3.3.0
AMD AGESA	1.2.0.F

🔐 Trusted Platform Module (TPM)

Parameter	Value
Type	fTPM (Firmware TPM)
Version	TPM 2.0
Manufacturer	AMD
Implementation	AMD CPU fTPM
Interface	CRB (Command Response Buffer)
ACPI	TPM2 table present
Device	`/dev/tpm0`, `/dev/tpmrm0`
Permissions	`tss` group
Kernel Driver	`tpm_crb` (built-in)
Status	Enabled in UEFI
Compliance	FIPS 140-2
TPM Revision	1.38
PCRs	24
Input Buffer	1024 bytes
Max Command Size	4096 bytes
Max Response Size	4096 bytes
Hardware RNG	Disabled (CRB design)

🔊 Audio

Component	Details
Sound Card	Creative Sound Blaster Z
Chip	CA0132 Sound Core3D
PCI ID	`1102:0012`
Driver	ALSA (`snd_ca0132`)
Hi-res Audio	Enabled `32 bits / 192kHz`
Speakers	Edifier M90

🌐 Network — Ethernet

Component	Details
Controller	Intel I211 Gigabit
PCI ID	`8086:1539`
Driver	`igb`

📡 Wi-Fi / Bluetooth

Component	Details
Wi-Fi	Intel AX210
Standard	Wi-Fi 6E (802.11ax)
PCI ID	`8086:2725`
Driver	`iwlwifi`
Bluetooth	5.3
USB ID	`8087:0032`
Driver	`btusb` + `btintel` (kernel modules loaded)

Linux kernel

The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software.

Quick Start

Report a bug: See Documentation/admin-guide/reporting-issues.rst
Get the latest kernel: https://kernel.org
Build the kernel: See Documentation/admin-guide/quickly-build-trimmed-linux.rst
Join the community: https://lore.kernel.org/

Essential Documentation

All users should be familiar with:

Building requirements: Documentation/process/changes.rst
Code of Conduct: Documentation/process/code-of-conduct.rst
License: See COPYING

Documentation can be built with make htmldocs or viewed online at: https://www.kernel.org/doc/html/latest/

Who Are You?

Find your role below:

New Kernel Developer - Getting started with kernel development
Academic Researcher - Studying kernel internals and architecture
Security Expert - Hardening and vulnerability analysis
Backport/Maintenance Engineer - Maintaining stable kernels
System Administrator - Configuring and troubleshooting
Maintainer - Leading subsystems and reviewing patches
Hardware Vendor - Writing drivers for new hardware
Distribution Maintainer - Packaging kernels for distros

Name		Name	Last commit message	Last commit date
.github/workflows		.github/workflows
configs		configs
patchs		patchs
LICENSE		LICENSE
README.md		README.md

Navigation Menu

Repository files navigation

📌 Project Architecture & CI/CD Workflow

⚡ Kernel Customization & Performance

🛠️ Custom Kernel Optimizations & Performance Features (config-6.19.14-debian13)

🧹 1. Hardware Trimming & Bloat Elimination

⏱️ 2. Low-Latency Tuning (Gaming & High-Res Audio)

🧠 3. CPU Optimizations (AMD Ryzen 9 5950X — 16C / 32T)

🎮 4. GPU & Display Core (Radeon RX 6950 XT / Navi 21)

🌐 5. Networking & Congestion Control

💾 6. Memory Tuning (Zswap `lzo`)

🛠️ 7. Diagnostics & CI/CD Pipeline

🔍 Post-Boot Verification & Diagnostic Commands

Hardware

🐧 Kernel and Toolchain

📦 Build Dependencies

🧠 CPU

💾 Memory RAM

🎮 GPU

🎮 GPU APIs

🧩 Motherboard

🔐 Trusted Platform Module (TPM)

🔊 Audio

🌐 Network — Ethernet

📡 Wi-Fi / Bluetooth

Linux kernel

Quick Start

Essential Documentation

Who Are You?

About

Releases

Packages

Contributors

Latest commit

History

Folders and files

Repository files navigation

📌 Project Architecture & CI/CD Workflow

⚡ Kernel Customization & Performance

🛠️ Custom Kernel Optimizations & Performance Features (config-6.19.14-debian13)

🧹 1. Hardware Trimming & Bloat Elimination

⏱️ 2. Low-Latency Tuning (Gaming & High-Res Audio)

🧠 3. CPU Optimizations (AMD Ryzen 9 5950X — 16C / 32T)

🎮 4. GPU & Display Core (Radeon RX 6950 XT / Navi 21)

🌐 5. Networking & Congestion Control

💾 6. Memory Tuning (Zswap lzo)

🛠️ 7. Diagnostics & CI/CD Pipeline

🔍 Post-Boot Verification & Diagnostic Commands

Hardware

🐧 Kernel and Toolchain

📦 Build Dependencies

🧠 CPU

💾 Memory RAM

🎮 GPU

🎮 GPU APIs

🧩 Motherboard

🔐 Trusted Platform Module (TPM)

🔊 Audio

🌐 Network — Ethernet

📡 Wi-Fi / Bluetooth

Linux kernel

Quick Start

Essential Documentation

Who Are You?

About

Topics

Resources

Stars

Watchers

Forks

Releases

Packages

Contributors

💾 6. Memory Tuning (Zswap `lzo`)