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linux: Add version 6.12.XXX #3231

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donald
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@donald donald commented Apr 18, 2025 •
edited by pmenzel
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Tested Linux 6.12.27-482 on maleficent (AMD graphics).

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pmenzel commented Apr 18, 2025

Yout beat me to it. ;-) I already checked out the branch this morning.

Now that pahole is in MarIuX, it’d be great, if you could built the BTF (BPF Type Format) encoded debug information, so that we can use ptcpdump.

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donald commented Apr 19, 2025

With CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y, CONFIG_DEBUG_INFO_BTF=y:


 LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     .vmlinux.objs
  MODPOST Module.symvers
  CC      .vmlinux.export.o
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  KSYMS   .tmp_vmlinux0.kallsyms.S
  AS      .tmp_vmlinux0.kallsyms.o
  LD      .tmp_vmlinux1
  BTF     .tmp_vmlinux1.btf.o
die__process: DW_TAG_compile_unit, DW_TAG_type_unit, DW_TAG_partial_unit or DW_TAG_skeleton_unit expected got INVALID (0x0) @ 115a59b!
error decoding cu 
pahole: .tmp_vmlinux1: Invalid argument
  NM      .tmp_vmlinux1.syms
  KSYMS   .tmp_vmlinux1.kallsyms.S
  AS      .tmp_vmlinux1.kallsyms.o
  LD      .tmp_vmlinux2
  NM      .tmp_vmlinux2.syms
  KSYMS   .tmp_vmlinux2.kallsyms.S
  AS      .tmp_vmlinux2.kallsyms.o
  LD      vmlinux
  BTFIDS  vmlinux
libbpf: failed to find '.BTF' ELF section in vmlinux
FAILED: load BTF from vmlinux: No data available
make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 255
make[2]: *** Deleting file 'vmlinux'
make[1]: *** [/scratch/local/linux/Makefile:1179: vmlinux] Error 2
make: *** [Makefile:224: __sub-make] Error 2

Just tried, no time for debugging right now. Any idea?

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pmenzel commented Apr 19, 2025

Just tried, no time for debugging right now. Any idea?

Unfortunately, I do not. Sorry for wasting your time. I am going to do more tests next week.

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pmenzel commented Apr 19, 2025

For next week from Reddit:

You need BTF debug info enabled for BTF to be found correctly but debug needs to be setup correctly.
Debug compressed needs to be disabled, split debugging disabled, struct randomization for gcc disabled ect.
There are other options that will block or interfere with debugging for btf.

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donald commented Apr 22, 2025

What exactly do we need this for?

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pmenzel commented Apr 22, 2025 •
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What exactly do we need this for?

To fully use eBPF. For example, ptcpdump is able to also show the process ids. I do not know the details, but it needs the BTF symbols.

@pmenzel pmenzel closed this in ff4776c Apr 26, 2025
@pmenzel pmenzel reopened this Apr 26, 2025
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donald commented Apr 29, 2025

Shoud we build a nvidia driver for this (if so, what version) ? @thomas

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thomas commented Apr 29, 2025 via email

@donald
linux-6.12.12: Rebuld with BTF debug info
44f5fa1 
+CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
+CONFIG_DEBUG_INFO_BTF=y
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pmenzel commented Apr 29, 2025

Could you please also build with CONFIG_NET_SCH_INGRESS=m for https://github.molgen.mpg.de/mariux64/mariux64-issues/issues/157#issuecomment-20474? (You could also do this in 6.12.25.)

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pmenzel commented May 5, 2025

For testing:

@sigcont:~$ sudo bee install -f linux-6.12.23-481 nvidia_current-570.144-0 nvidia_linux-6.12.23-481-570.144-0

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pmenzel commented May 5, 2025

Size increase of 52 MB for package nvidia_current:

[…]
-rw-r--r-- 1 pmenzel pmenzel 184M Jan 24 15:40 /src/mariux/beeroot/packages/nvidia_current-535.230.02-0.x86_64.bee.tar.bz2
-rw-r--r-- 1 pmenzel pmenzel 236M May  5 10:24 /src/mariux/beeroot/packages/nvidia_current-570.144-0.x86_64.bee.tar.bz2

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pmenzel commented May 5, 2025

Loading Nvidia 570.144 module fails with

[   15.527570] nvidia: loading out-of-tree module taints kernel.
[   15.533684] nvidia: module license 'NVIDIA' taints kernel.
[   15.539506] Disabling lock debugging due to kernel taint
[   15.545212] nvidia: module license taints kernel.
[   15.836685] i915 0000:00:02.0: enabling device (0000 -> 0003)
[   15.843416] i915 0000:00:02.0: [drm] Found COFFEELAKE (device ID 3e98) display version 9.00 stepping N/A
[   15.854129] i915 0000:00:02.0: [drm] VT-d active for gfx access
[   15.861218] i915 0000:00:02.0: [drm] Using Transparent Hugepages
[   15.872476] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
[   15.924521] nvidia-nvlink: Nvlink Core is being initialized, major device number 238

[   15.934738] nvidia 0000:01:00.0: vgaarb: VGA decodes changed: olddecodes=io+mem,decodes=none:owns=io+mem
[   16.218135] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  570.144  Thu Apr 10 20:33:29 UTC 2025
[   16.285645] nvidia_uvm: module uses symbols nvUvmInterfaceDisableAccessCntr from proprietary module nvidia, inheriting taint.
[   16.354056] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  570.144  Thu Apr 10 20:03:03 UTC 2025
[   16.370767] nvidia_drm: Unknown symbol drm_fbdev_ttm_driver_fbdev_probe (err -2)

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pmenzel commented May 5, 2025

Works with the old Nvidia driver:

sudo bee install -f nvidia_linux-6.12.23-481-535.230.02-0.x86_64

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pmenzel commented May 5, 2025 

[   16.354056] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms  570.144  Thu Apr 10 20:03:03 UTC 2025
[   16.370767] nvidia_drm: Unknown symbol drm_fbdev_ttm_driver_fbdev_probe (err -2)

For the Nvidia module 570.144, manually inserting/loading the module drm_ttm_helper with sudo modprobe drm_ttm_helper, fixes the error. I guess /sbin/nvidiactl needs to be adapted.

@donald
linux: Ugrade version from 6.12.23 TO 6.12.27
a55e30f 
Update version. 6.12.27-482 also has `CONFIG_NET_SCH_INGRESS=m`.
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donald commented May 6, 2025 •
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For the Nvidia module 570.144, manually inserting/loading the module drm_ttm_helper with sudo modprobe drm_ttm_helper, fixes the error. I guess /sbin/nvidiactl needs to be adapted.

We can do that but I wonder why the module isn't inserted automagically if it is needed?

@donald
nvidia_linux: Build version 570.144 for linux 6.12.27-482
c89e5d8 
Build version 570.144 for linux 6.12.27-482 and remove other builds for
linux 6.12.*.
@donald donald mentioned this pull request May 6, 2025
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@donald donald changed the title linux: Add version 6.12.23 linux: Add version 6.12.XXX May 6, 2025
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3 participants
@donald @pmenzel @thomas