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Install

Install this package:

emerge -a sys-kernel/cachyos-sources

If the package is masked, you can unmask it using the autounmask tool or standard emerge options:

autounmask sys-kernel/cachyos-sources

Or alternatively:

emerge --autounmask-write -a sys-kernel/cachyos-sources

Package Information

Description:: Linux EEVDF + LTO + AutoFDO + Propeller Cachy Sauce Kernel by CachyOS with other patches and improvements.
Homepage:: https://github.com/CachyOS/linux-cachyos
License:: GPL-3

Versions

Version	EAPI	Keywords	Slot
7.0.5	8	~amd64
6.18.28	8	~amd64

Metadata

Maintainers

Jakub Wroński (szowisz.gentoo@gmail.com) - Type: person
xz-dev (xz@xzos.net) - Type: person

Upstream

Bugs: https://github.com/CachyOS/linux-cachyos/issues
Remote IDs:
- github: CachyOS/linux-cachyos

Raw Metadata XML

<pkgmetadata>
	<maintainer type="person">
		<email>szowisz.gentoo@gmail.com</email>
		<name>Jakub Wroński</name>
	</maintainer>
	<maintainer type="person">
		<email>xz@xzos.net</email>
		<name>xz-dev</name>
	</maintainer>
	<use>
		<flag name="bore">CachyOS Scheduler (BORE - Burst-Oriented Response Enhancer), optimized for desktop responsiveness</flag>
		<flag name="bmq">Project C BMQ (BitMap Queue) scheduler, alternative CPU scheduler with different performance characteristics</flag>
		<flag name="rt">EEVDF scheduler with realtime patches for low-latency applications</flag>
		<flag name="rt-bore">BORE scheduler with realtime patches for low-latency applications</flag>
		<flag name="eevdf">Default Linux EEVDF (Earliest Eligible Virtual Deadline First) scheduler</flag>
		<flag name="deckify">Enable patches for handheld devices like Steam Deck (includes WiFi, ACPI, and handheld-specific patches)</flag>
		<flag name="hardened">Enable hardened kernel patches for enhanced security</flag>
		<flag name="kcfi">Enable kCFI (Kernel Control Flow Integrity) for additional security protection</flag>
		<flag name="autofdo">Enable Clang AutoFDO (Automatic Feedback-Directed Optimization) support for profile-guided optimization</flag>
		<flag name="propeller">Enable Clang Propeller optimization (basic block reordering) for better performance</flag>
		<flag name="llvm-lto-thin">Enable LLVM thin LTO (Link Time Optimization) - uses multiple threads, faster compilation, less memory usage</flag>
		<flag name="llvm-lto-full">Enable LLVM full LTO - single threaded, slower compilation, more memory usage, potentially highest performance</flag>
		<flag name="llvm-lto-thin-dist">Enable LLVM thin LTO with distributed model rather than in-process linking</flag>
		<flag name="kernel-builtin-zfs">Build ZFS module directly into the kernel (not recommended, use sys-fs/zfs-kmod instead)</flag>
		<flag name="hz_ticks_100">Set kernel timer frequency to 100 Hz (server/battery optimized)</flag>
		<flag name="hz_ticks_250">Set kernel timer frequency to 250 Hz (balanced)</flag>
		<flag name="hz_ticks_300">Set kernel timer frequency to 300 Hz</flag>
		<flag name="hz_ticks_500">Set kernel timer frequency to 500 Hz</flag>
		<flag name="hz_ticks_600">Set kernel timer frequency to 600 Hz</flag>
		<flag name="hz_ticks_750">Set kernel timer frequency to 750 Hz</flag>
		<flag name="hz_ticks_1000">Set kernel timer frequency to 1000 Hz (desktop optimized, default)</flag>
		<flag name="per-gov">Set CPU frequency performance governor as default instead of schedutil</flag>
		<flag name="tickrate_periodic">Use periodic ticks (traditional approach)</flag>
		<flag name="tickrate_idle">Use idle tickless mode (NO_HZ_IDLE)</flag>
		<flag name="tickrate_full">Use full tickless mode (NO_HZ_FULL) - can provide higher performance but lower consistency depending on hardware</flag>
		<flag name="preempt_full">Full preemption model for lowest latency (PREEMPT)</flag>
		<flag name="preempt_lazy">Lazy preemption model (PREEMPT_LAZY)</flag>
		<flag name="preempt_voluntary">Voluntary preemption model for server workloads (PREEMPT_VOLUNTARY)</flag>
		<flag name="o3">Enable KBUILD_CFLAGS -O3 optimization for maximum performance</flag>
		<flag name="os">Optimize for size (-Os) instead of performance</flag>
		<flag name="debug">Enable debug-friendly optimizations and disable various debug features</flag>
		<flag name="bbr3">Enable TCP BBR3 (Bottleneck Bandwidth and RTT) congestion control algorithm as default</flag>
		<flag name="hugepage_always">Always enable Transparent Huge Pages for better memory performance</flag>
		<flag name="hugepage_madvise">Enable Transparent Huge Pages only when requested via madvise</flag>
		<flag name="mgeneric">Use generic x86-64 optimizations (default kernel optimizations, portable across machines)</flag>
		<flag name="mgeneric_v1">Use x86-64-v1 generic optimizations (baseline x86-64)</flag>
		<flag name="mgeneric_v2">Use x86-64-v2 generic optimizations (requires CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3)</flag>
		<flag name="mgeneric_v3">Use x86-64-v3 generic optimizations (requires AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE)</flag>
		<flag name="mgeneric_v4">Use x86-64-v4 generic optimizations (requires AVX512F, AVX512BW, AVX512CD, AVX512DQ, AVX512VL)</flag>
		<flag name="mnative">Use compiler native CPU autodetection optimizations (recommended for local builds, not portable)</flag>
		<flag name="mzen4">Use AMD Zen 4 specific optimizations (znver4) for AMD Ryzen 7000 series and newer</flag>
	</use>
	<upstream>
		<bugs-to>https://github.com/CachyOS/linux-cachyos/issues</bugs-to>
		<remote-id type="github">CachyOS/linux-cachyos</remote-id>
	</upstream>
</pkgmetadata>

Lint Warnings

[Warning] USE flag 'llvm-lto-none' in ebuild 7.0.5 is not documented in metadata.xml
[Warning] USE flag 'llvm-lto-none' in ebuild 6.18.28 is not documented in metadata.xml
[Warning] USE flag 'preempt_none' in ebuild 6.18.28 is not documented in metadata.xml
[Warning] Ebuild 7.0.5 is missing the SLOT variable.
[Warning] Ebuild 6.18.28 is missing the SLOT variable.
[Error] Missing md5-cache for ebuild cachyos-sources-7.0.5
[Error] Missing md5-cache for ebuild cachyos-sources-6.18.28

USE Flags

Manage flags for this package: euse -i <flag> -p sys-kernel/cachyos-sources | euse -E <flag> -p sys-kernel/cachyos-sources | euse -D <flag> -p sys-kernel/cachyos-sources

Flag	Description	7.0.5	6.18.28
autofdo	Enable Clang AutoFDO (Automatic Feedback-Directed Optimization) support for profile-guided optimization	⊕	⊕
bbr3	Enable TCP BBR3 (Bottleneck Bandwidth and RTT) congestion control algorithm as default	⊕	⊕
bmq	Project C BMQ (BitMap Queue) scheduler, alternative CPU scheduler with different performance characteristics	✓	✓
bore	CachyOS Scheduler (BORE - Burst-Oriented Response Enhancer), optimized for desktop responsiveness	⊕	⊕
debug	Enable debug-friendly optimizations and disable various debug features	✓	✓
deckify	Enable patches for handheld devices like Steam Deck (includes WiFi, ACPI, and handheld-specific patches)	✓	✓
eevdf	Default Linux EEVDF (Earliest Eligible Virtual Deadline First) scheduler	✓	✓
hardened	Enable hardened kernel patches for enhanced security	✗	✓
hugepage_always	Always enable Transparent Huge Pages for better memory performance	⊕	⊕
hugepage_madvise	Enable Transparent Huge Pages only when requested via madvise	✓	✓
hz_ticks_100	Set kernel timer frequency to 100 Hz (server/battery optimized)	✓	✓
hz_ticks_1000	Set kernel timer frequency to 1000 Hz (desktop optimized, default)	⊕	⊕
hz_ticks_250	Set kernel timer frequency to 250 Hz (balanced)	✓	✓
hz_ticks_300	Set kernel timer frequency to 300 Hz	✓	✓
hz_ticks_500	Set kernel timer frequency to 500 Hz	✓	✓
hz_ticks_600	Set kernel timer frequency to 600 Hz	✓	✓
hz_ticks_750	Set kernel timer frequency to 750 Hz	✓	✓
kcfi	Enable kCFI (Kernel Control Flow Integrity) for additional security protection	✓	✓
kernel-builtin-zfs	Build ZFS module directly into the kernel (not recommended, use sys-fs/zfs-kmod instead)	✓	✓
llvm-lto-full	Enable LLVM full LTO - single threaded, slower compilation, more memory usage, potentially highest performance	✓	✓
llvm-lto-none	⚠️	✓	✓
llvm-lto-thin	Enable LLVM thin LTO (Link Time Optimization) - uses multiple threads, faster compilation, less memory usage	⊕	✓
llvm-lto-thin-dist	Enable LLVM thin LTO with distributed model rather than in-process linking	✓	⊕
mgeneric	Use generic x86-64 optimizations (default kernel optimizations, portable across machines)	✓	✓
mgeneric_v1	Use x86-64-v1 generic optimizations (baseline x86-64)	✓	✓
mgeneric_v2	Use x86-64-v2 generic optimizations (requires CMPXCHG16B, LAHF-SAHF, POPCNT, SSE3, SSE4.1, SSE4.2, SSSE3)	✓	✓
mgeneric_v3	Use x86-64-v3 generic optimizations (requires AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, XSAVE)	✓	✓
mgeneric_v4	Use x86-64-v4 generic optimizations (requires AVX512F, AVX512BW, AVX512CD, AVX512DQ, AVX512VL)	✓	✓
mnative	Use compiler native CPU autodetection optimizations (recommended for local builds, not portable)	⊕	⊕
mzen4	Use AMD Zen 4 specific optimizations (znver4) for AMD Ryzen 7000 series and newer	✓	✓
o3	Enable KBUILD_CFLAGS -O3 optimization for maximum performance	⊕	⊕
os	Optimize for size (-Os) instead of performance	✓	✓
per-gov	Set CPU frequency performance governor as default instead of schedutil	⊕	⊕
preempt_full	Full preemption model for lowest latency (PREEMPT)	⊕	⊕
preempt_lazy	Lazy preemption model (PREEMPT_LAZY)	✓	✓
preempt_none	⚠️	✗	✓
preempt_voluntary	Voluntary preemption model for server workloads (PREEMPT_VOLUNTARY)	✗	✓
propeller	Enable Clang Propeller optimization (basic block reordering) for better performance	⊕	⊕
rt	EEVDF scheduler with realtime patches for low-latency applications	✓	✓
rt-bore	BORE scheduler with realtime patches for low-latency applications	✓	✓
tickrate_full	Use full tickless mode (NO_HZ_FULL) - can provide higher performance but lower consistency depending on hardware	⊕	⊕
tickrate_idle	Use idle tickless mode (NO_HZ_IDLE)	✓	✓
tickrate_periodic	Use periodic ticks (traditional approach)	✓	✓

Files

auto-cpu-optimization-clang-support-6.6.patch
kernel-build.sh

Manifest

Type	File	Size	Versions
DIST	zfs-0829cf892b5d7b3a0e8aa76cc7aca02b84f62557.tar.gz	33747044 bytes	7.0.5
DIST	zfs-1c702dda346a59e05cfd3029569bbb1d5d91c54b.tar.gz	33745345 bytes	6.18.28

Unmatched Entries

Type	File	Size
DIST	cachyos-6.18.28-1.tar.gz	255278188 bytes
DIST	cachyos-7.0.5-1.tar.gz	260404773 bytes
DIST	genpatches-6.18-28.base.tar.xz	1698492 bytes
DIST	genpatches-6.18-28.extras.tar.xz	3980 bytes
DIST	genpatches-7.0-6.base.tar.xz	160844 bytes
DIST	genpatches-7.0-6.extras.tar.xz	3976 bytes

sys-kernel/cachyos-sources (CachyOS-kernels)