Debian 9699 Published by

The first XanMod Linux Kernel based on the new Linux Kernel 6.3 series has been released. XanMod is a general-purpose Linux kernel distribution with custom settings and new features. The real-time version is recommended for critical runtime applications such as Linux gaming eSports, streaming, live productions and ultra-low latency enthusiasts.

Linux 6.3.0-xanmod1

XanMod is a general-purpose Linux kernel distribution with custom settings and new features. Built to provide a stable, responsive and smooth desktop experience.

The real-time version is recommended for critical runtime applications such as Linux gaming eSports, streaming, live productions and ultra-low latency enthusiasts.

Supports all recent 64-bit versions of Debian and Ubuntu-based systems.

Main Features

  • Preemptive Full Tickless Kernel at 500Hz w/ Tuned CPU Core Scheduler.
  • RCU Boost for better responsiveness and lower overall system latency.
  • Block Layer w/ multi-threaded runqueue for high I/O throughput.
  • Caching, Virtual Memory Manager and CPUFreq Governor improvements.
  • BBR TCP Congestion Control + FQ-PIE Packet Scheduling and AQM Algorithm [5.8].
  • ORC Unwinder for Kernel Stack Traces (debuginfo) implementation.
  • Third-party patchset available: ZSTD kernel, initrd and modules support [5.8][5.6-rt], Full x86_64 FSGSBASE instructions [5.8], Clear Linux [partial], CK's Hrtimer Patchset [5.8][5.4], Wine / Proton Fsync, PCIe ACS Override, BMQ Process Scheduler [5.4 stock disabled], Aufs [5.4] and GCC graysky's.
  • Real-time Linux kernel (PREEMPT_RT) build available [5.6-rt][5.4-rt].
  • Generic kernel package for compatibility with most Debian & Ubuntu based distributions. Built on the latest GCC 10.2 and Binutils 2.35.
  • GPLv2 license. Can be built for any distribution or purpose.

Install via Terminal

echo 'deb releases main' | sudo tee /etc/apt/sources.list.d/xanmod-kernel.list && wget -qO - | sudo apt-key add -

Then update and install:

sudo apt update && sudo apt install linux-xanmod


Meta packages available: linux-xanmodlinux-xanmod-edgelinux-xanmod-ltslinux-xanmod-rt-edge and linux-xanmod-rt.

To try without adding the repository

Download from Sourceforge and install:

  1. In terminal:
    sudo dpkg -i linux-image-*xanmod*.deb linux-headers-*xanmod*.deb
  2. Reboot.
  • Check it:
    cat /proc/version
* linux-firmware-image package is optional

Linux 6.3.0-xanmod1

fec91f7 Linux 6.3.0-xanmod1
3e3c868 i2c: busses: Add SMBus capability to work with OpenRGB driver control
7ed5b39 PCI: Enable overrides for missing ACS capabilities
2d97e0c sysctl: add sysctl to disallow unprivileged CLONE_NEWUSER by default
a2b8b51 winesync: Introduce the winesync driver and character device patchset
3f7afe6 binder: give binder_alloc its own debug mask file
43810aa binder: turn into module
fe2909a mac80211: ignore AP power level when tx power type is "fixed"
97f072f netfilter: add xt_FLOWOFFLOAD target
5f603da netfilter: Add netfilter nf_tables fullcone support
3872bdb tcp: Add a sysctl to skip tcp collapse processing when the receive buffer is full
9d67827 net-tcp_bbr: v2: Use correct 64-bit division
6666d83 net-tcp_bbr: v2: Fix missing ECT markings on retransmits for BBRv2
de66295 net-tcp_bbr: v2: don't assume prior_cwnd was set entering CA_Loss
4c92380 net-tcp_bbr: v2: remove cycle_rand parameter that is unused in BBRv2
1a4375f net-tcp_bbr: v2: remove field bw_rtts that is unused in BBRv2
23427f7 net-tcp_bbr: v2: remove unnecessary rs.delivered_ce logic upon loss
fabef98 net-tcp_bbr: v2: BBRv2 ("bbr2") congestion control for Linux TCP
4cfbdcf net-tcp: add fast_ack_mode=1: skip rwin check in tcp_fast_ack_mode__tcp_ack_snd_check()
ff28122 net-tcp: re-generalize TSO sizing in TCP CC module API
bde9109 net-tcp: add new ca opts flag TCP_CONG_WANTS_CE_EVENTS
2537dde net-tcp_bbr: v2: set tx.in_flight for skbs in repair write queue
2ad5de9 net-tcp_bbr: v2: adjust skb tx.in_flight upon split in tcp_fragment()
3bc3999 net-tcp_bbr: v2: adjust skb tx.in_flight upon merge in tcp_shifted_skb()
187b32f net-tcp_bbr: v2: factor out tx.in_flight setting into tcp_set_tx_in_flight()
198869d net-tcp_bbr: v2: introduce ca_ops->skb_marked_lost() CC module callback API
e1b7208 net-tcp_bbr: v2: export FLAG_ECE in rate_sample.is_ece
baccd49 net-tcp_bbr: v2: count packets lost over TCP rate sampling interval
4099723 net-tcp_bbr: v2: snapshot packets in flight at transmit time and pass in rate_sample
1d94500 net-tcp_bbr: v2: shrink delivered_mstamp, first_tx_mstamp to u32 to free up 8 bytes
013ce00 net-tcp_bbr: broaden app-limited rate sample detection
2336e1f futex: Add entry point for FUTEX_WAIT_MULTIPLE (opcode 31)
12b5f9c init: wait for partition and retry scan
a64887c drivers: initialize ata before graphics
27fcb57 locking: rwsem: spin faster
e7dd778 firmware: Enable stateless firmware loading
4d19302 intel_rapl: Silence rapl trace debug
2e661dc sched/wait: Do accept() in LIFO order for cache efficiency
6d48753 x86/vdso: Use lfence instead of rep and nop
93d594b x86/sched/itmt: Give all SMT siblings of a core the same priority
68c6cdf x86/sched: Add the SD_ASYM_PACKING flag to the die domain of hybrid processors
0c10ff4 x86/sched: Remove SD_ASYM_PACKING from the SMT domain flags
720cd96 sched/topology: Check SDF_SHARED_CHILD in highest_flag_domain()
4dee00e sched/topology: Remove SHARED_CHILD from ASYM_PACKING
1104db3 sched/fair: Do not even the number of busy CPUs via asym_packing
f2fc9e2 sched/fair: Use the busiest group to set prefer_sibling
c2fb394 sched/fair: Keep a fully_busy SMT sched group as busiest
e40b4f7 sched/fair: Let low-priority cores help high-priority busy SMT cores
1e1c894 sched/fair: Simplify asym_packing logic for SMT cores
d460792 sched/fair: Only do asym_packing load balancing from fully idle SMT cores
219b941 sched/fair: Move is_core_idle() out of CONFIG_NUMA
883101d sched/fair: Introduce SIS_SHORT to wake up short task on current CPU
93d91f9 sched/fair: Record the average duration of a task
526dbd9 XANMOD: Makefile: Move ARM and x86 instruction set selection to kernel-wide build
91f01db x86/kconfig: more uarches for kernel 5.17+
abf62b6 XANMOD: scripts/setlocalversion: Move localversion* files to the end
034eb67 XANMOD: scripts/setlocalversion: remove "+" tag for git repo short version
a9d38fa XANMOD: Makefile: Disable GCC vectorization on trees
2b848a9 XANMOD: lib/kconfig.debug: disable default CONFIG_SYMBOLIC_ERRNAME and CONFIG_DEBUG_BUGVERBOSE
c959051 XANMOD: cpufreq: tunes ondemand and conservative governor for performance
ae7c574 XANMOD: sched/autogroup: Add kernel parameter and config option to enable/disable autogroup feature by default
f14602b XANMOD: mm/vmscan: vm_swappiness = 30 decreases the amount of swapping
f943d3f XANMOD: dcache: cache_pressure = 50 decreases the rate at which VFS caches are reclaimed
4880350 XANMOD: kconfig: add 500Hz timer interrupt kernel config option
cc7bfd1 XANMOD: block: set rq_affinity to force full multithreading I/O requests
95077d2 XANMOD: block/mq-deadline: Disable front_merges by default
17c6671 XANMOD: block/mq-deadline: Increase write priority to improve responsiveness
2e330b7 XANMOD: rcu: Change sched_setscheduler_nocheck() calls to SCHED_RR policy
1c21dd9 XANMOD: sched/core: Add yield_type sysctl to reduce or disable sched_yield
6683411 XANMOD: fair: Remove all energy efficiency functions
c17d4e4 XANMOD: x86/build: Add more x86_64 optimizations
457391b Linux 6.3


Download Linux 6.3.0-xanmod1 source from GitHub