Skip to content

Instantly share code, notes, and snippets.

@ivan

ivan/nixpkgs patch to build fewer kernel things.patch

Created May 12, 2023 02:37
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save ivan/e916cf975135a95174203b51d72d6ef9 to your computer and use it in GitHub Desktop.
Save ivan/e916cf975135a95174203b51d72d6ef9 to your computer and use it in GitHub Desktop.
Download ZIP
nixpkgs patch to build fewer kernel things
Raw
nixpkgs patch to build fewer kernel things.patch
From 283f99d20990d094d74ac60b98e082a16511389b Mon Sep 17 00:00:00 2001
From: Ivan Kozik <ivan@ludios.org>
Date: Fri, 12 May 2023 02:18:33 +0000
Subject: [PATCH] linux/common-config: don't build things that we'll never use
---
.../linux/kernel/common-config.nix | 114 ++----------------
1 file changed, 8 insertions(+), 106 deletions(-)
diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index 6e704e2ad2ab..1fc5fd3858be 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -176,18 +176,12 @@ let
NET_CLS_BPF = module;
NET_ACT_BPF = module;
NET_SCHED = yes;
- L2TP_V3 = yes;
- L2TP_IP = module;
- L2TP_ETH = module;
BRIDGE_VLAN_FILTERING = yes;
BONDING = module;
NET_L3_MASTER_DEV = option yes;
NET_FOU_IP_TUNNELS = option yes;
IP_NF_TARGET_REDIRECT = module;
- PPP_MULTILINK = yes; # PPP multilink support
- PPP_FILTER = yes;
-
# needed for iwd WPS support (wpa_supplicant replacement)
KEY_DH_OPERATIONS = yes;
@@ -231,19 +225,9 @@ let
INET_RAW_DIAG = mkDefault module;
INET_DIAG_DESTROY = mkDefault yes;
- # enable multipath-tcp
- MPTCP = whenAtLeast "5.6" yes;
- MPTCP_IPV6 = whenAtLeast "5.6" yes;
- INET_MPTCP_DIAG = whenAtLeast "5.9" (mkDefault module);
-
# Kernel TLS
TLS = module;
TLS_DEVICE = whenAtLeast "4.18" yes;
-
- # infiniband
- INFINIBAND = module;
- INFINIBAND_IPOIB = module;
- INFINIBAND_IPOIB_CM = yes;
};
wireless = {
@@ -265,14 +249,6 @@ let
FB = yes;
FB_EFI = yes;
FB_NVIDIA_I2C = yes; # Enable DDC Support
- FB_RIVA_I2C = yes;
- FB_ATY_CT = yes; # Mach64 CT/VT/GT/LT (incl. 3D RAGE) support
- FB_ATY_GX = yes; # Mach64 GX support
- FB_SAVAGE_I2C = yes;
- FB_SAVAGE_ACCEL = yes;
- FB_SIS_300 = yes;
- FB_SIS_315 = yes;
- FB_3DFX_ACCEL = yes;
FB_VESA = yes;
FRAMEBUFFER_CONSOLE = yes;
FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER = whenAtLeast "4.19" yes;
@@ -410,12 +386,12 @@ let
TMPFS_POSIX_ACL = yes;
FS_ENCRYPTION = if (versionAtLeast version "5.1") then yes else option module;
- EXT2_FS_XATTR = yes;
- EXT2_FS_POSIX_ACL = yes;
- EXT2_FS_SECURITY = yes;
-
- EXT3_FS_POSIX_ACL = yes;
- EXT3_FS_SECURITY = yes;
+ EXT2_FS = no;
+ EXT3_FS = no;
+ REISERFS_FS = no;
+ JFS_FS = no;
+ XFS_FS = no;
+ F2FS_FS = no;
EXT4_FS_POSIX_ACL = yes;
EXT4_FS_SECURITY = yes;
@@ -425,28 +401,12 @@ let
NTFS3_LZX_XPRESS = whenAtLeast "5.15" yes;
NTFS3_FS_POSIX_ACL = whenAtLeast "5.15" yes;
- REISERFS_FS_XATTR = option yes;
- REISERFS_FS_POSIX_ACL = option yes;
- REISERFS_FS_SECURITY = option yes;
-
- JFS_POSIX_ACL = option yes;
- JFS_SECURITY = option yes;
-
- XFS_QUOTA = option yes;
- XFS_POSIX_ACL = option yes;
- XFS_RT = option yes; # XFS Realtime subvolume support
- XFS_ONLINE_SCRUB = option yes;
-
OCFS2_DEBUG_MASKLOG = option no;
BTRFS_FS_POSIX_ACL = yes;
UBIFS_FS_ADVANCED_COMPR = option yes;
- F2FS_FS = module;
- F2FS_FS_SECURITY = option yes;
- F2FS_FS_ENCRYPTION = whenOlder "5.1" yes;
- F2FS_FS_COMPRESSION = whenAtLeast "5.6" yes;
UDF_FS = module;
NFSD_V2_ACL = whenOlder "6.2" yes;
@@ -471,9 +431,6 @@ let
CIFS_ACL = whenOlder "5.3" yes;
CIFS_DFS_UPCALL = yes;
- CEPH_FSCACHE = yes;
- CEPH_FS_POSIX_ACL = yes;
-
SQUASHFS_FILE_DIRECT = yes;
SQUASHFS_DECOMP_MULTI_PERCPU = whenOlder "6.2" yes;
SQUASHFS_XATTR = yes;
@@ -581,9 +538,7 @@ let
};
staging = {
- # Enable staging drivers. These are somewhat experimental, but
- # they generally don't hurt.
- STAGING = yes;
+
};
proc-events = {
@@ -619,10 +574,7 @@ let
KVM_GUEST = yes;
KVM_MMIO = yes;
KVM_VFIO = yes;
- KSM = yes;
VIRT_DRIVERS = yes;
- # We need 64 GB (PAE) support for Xen guest support
- HIGHMEM64G = { optional = true; tristate = mkIf (!stdenv.is64bit) "y";};
VFIO_PCI_VGA = mkIf stdenv.is64bit yes;
@@ -632,37 +584,15 @@ let
VBOXGUEST = option no;
DRM_VBOXVIDEO = option no;
- XEN = option yes;
- XEN_DOM0 = option yes;
- PCI_XEN = option yes;
- HVC_XEN = option yes;
- HVC_XEN_FRONTEND = option yes;
- XEN_SYS_HYPERVISOR = option yes;
- SWIOTLB_XEN = option yes;
- XEN_BACKEND = option yes;
- XEN_BALLOON = option yes;
- XEN_BALLOON_MEMORY_HOTPLUG = option yes;
- XEN_EFI = option yes;
- XEN_HAVE_PVMMU = option yes;
- XEN_MCE_LOG = option yes;
- XEN_PVH = option yes;
- XEN_PVHVM = option yes;
- XEN_SAVE_RESTORE = option yes;
- XEN_SCRUB_PAGES = whenOlder "4.19" yes;
- XEN_SELFBALLOONING = whenOlder "5.3" yes;
-
# Enable device detection on virtio-mmio hypervisors
VIRTIO_MMIO_CMDLINE_DEVICES = yes;
};
media = {
- MEDIA_DIGITAL_TV_SUPPORT = yes;
MEDIA_CAMERA_SUPPORT = yes;
MEDIA_CONTROLLER = yes;
MEDIA_PCI_SUPPORT = yes;
MEDIA_USB_SUPPORT = yes;
- MEDIA_ANALOG_TV_SUPPORT = yes;
- VIDEO_STK1160_COMMON = module;
};
"9p" = {
@@ -823,10 +753,6 @@ let
AIC7XXX_DEBUG_ENABLE = no;
AIC94XX_DEBUG = no;
- BLK_DEV_INTEGRITY = yes;
-
- BLK_SED_OPAL = yes;
-
BSD_PROCESS_ACCT_V3 = yes;
SERIAL_DEV_BUS = yes; # enables support for serial devices
@@ -847,8 +773,6 @@ let
CLEANCACHE = whenOlder "5.17" (option yes);
CRASH_DUMP = option no;
- DVB_DYNAMIC_MINORS = option yes; # we use udev
-
EFI_STUB = yes; # EFI bootloader in the bzImage itself
EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER =
whenOlder "6.2" (whenAtLeast "5.8" yes); # initrd kernel parameter for EFI
@@ -878,7 +802,6 @@ let
LDM_PARTITION = yes;
LOGIRUMBLEPAD2_FF = yes; # Logitech Rumblepad 2 force feedback
LOGO = no; # not needed
- MEDIA_ATTACH = yes;
MEGARAID_NEWGEN = yes;
MLX5_CORE_EN = option yes;
@@ -918,9 +841,6 @@ let
SLAB_FREELIST_HARDENED = yes;
SLAB_FREELIST_RANDOM = yes;
- SLIP_COMPRESSED = yes; # CSLIP compressed headers
- SLIP_SMART = yes;
-
HWMON = yes;
THERMAL_HWMON = yes; # Hardware monitoring support
NVME_HWMON = whenAtLeast "5.5" yes; # NVMe drives temperature reporting
@@ -966,12 +886,6 @@ let
FSL_MC_UAPI_SUPPORT = mkIf (stdenv.hostPlatform.system == "aarch64-linux") (whenAtLeast "5.12" yes);
- ASHMEM = { optional = true; tristate = whenBetween "5.0" "5.18" "y";};
- ANDROID = { optional = true; tristate = whenBetween "5.0" "5.19" "y";};
- ANDROID_BINDER_IPC = { optional = true; tristate = whenAtLeast "5.0" "y";};
- ANDROID_BINDERFS = { optional = true; tristate = whenAtLeast "5.0" "y";};
- ANDROID_BINDER_DEVICES = { optional = true; freeform = whenAtLeast "5.0" "binder,hwbinder,vndbinder";};
-
TASKSTATS = yes;
TASK_DELAY_ACCT = yes;
TASK_XACCT = yes;
@@ -1009,21 +923,9 @@ let
FB_SIMPLE = yes;
} // optionalAttrs (versionAtLeast version "5.4" && (stdenv.hostPlatform.system == "x86_64-linux" || stdenv.hostPlatform.system == "aarch64-linux")) {
- # Required for various hardware features on Chrome OS devices
- CHROME_PLATFORMS = yes;
- CHROMEOS_TBMC = module;
-
- CROS_EC = module;
- CROS_EC_I2C = module;
- CROS_EC_SPI = module;
- CROS_EC_LPC = module;
- CROS_EC_ISHTP = module;
-
- CROS_KBD_LED_BACKLIGHT = module;
} // optionalAttrs (versionAtLeast version "5.4" && stdenv.hostPlatform.system == "x86_64-linux") {
- CHROMEOS_LAPTOP = module;
- CHROMEOS_PSTORE = module;
+
};
};
in
--
2.40.1
@ivan
Copy link
Author

ivan commented May 12, 2023 •
edited

Size reduction (Linux 6.1.28 is my first build with this patch)

-rwxr-xr-x 1 root root  8,652,096 2023-05-12 15:56 kwscica7hjdhphsabk3a3l84x4y54an4-linux-6.1.27-bzImage.efi*
-rwxr-xr-x 1 root root  8,255,840 2023-05-12 15:56 k60307ilj67x3sslpppgal3z06gkf9a1-linux-6.1.28-bzImage.efi*

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment