Re: Xenomai RTnet - Kernel module not loading

[Per Oberg <pero@wolfram.com>]

----- Den 25 feb 2020, på kl 15:24, Benji miethben@b-tu.de skrev:

> On 2/25/20 3:11 PM, Per Oberg wrote:

> > ----- Den 25 feb 2020, på kl 15:02, xenomai xenomai@xenomai.org skrev:

> >> Hello all,

> >> I'm a student working on a project comparing different real time OS
> >> approaches. Trying to get RTnet working on a Xenomai Cobalt kernel, but
> >> stuck on loading required kernel modules.

> >> System is running on Ubuntu 18.04 and uses following versions to build
> >> Xenomai kernel:

> >> Linux Kernel: 4.19.89
> >> IPIPE: 4.19.89
> >> Xenomai: 3.1

> >> Kernel is build as described in Xenomai wiki and configured with RTnet
> >> as kernel module.

> >> After installing xenomai kernel and checking the module, everything
> >> looks ok.

> >>> $ sudo modinfo /lib/modules/4.19.89/kernel/drivers/xenomai/net/stack/rtnet.ko
> >>> filename: /lib/modules/4.19.89/kernel/drivers/xenomai/net/stack/rtnet.ko
> >>> description: RTnet stack core
> >>> license: GPL
> >>> srcversion: E1B65CA6F28C7B08C111720
> >>> depends:
> >>> retpoline: Y
> >>> intree: Y
> >>> name: rtnet
> >>> vermagic: 4.19.89 SMP mod_unload
> >>> signat: PKCS#7
> >>> signer:
> >>> sig_key:
> >>> sig_hashalgo: md4
> >>> parm: stack_mgr_prio:Priority of the stack manager task (uint)
> >>> parm: socket_rtskbs:Default number of realtime socket buffers in socket pools
> >>> (uint)
> >>> parm: global_rtskbs:Number of realtime socket buffers in global pool (uint)
> >>> parm: device_rtskbs:Number of additional global realtime socket buffers per
> >>> network adapter (uint)

> >> But kernel module can't be loaded.

> >>> $ sudo insmod /lib/modules/4.19.89/kernel/drivers/xenomai/net/stack/rtnet.ko
> >>> insmod: ERROR: could not insert module
> >>> /lib/modules/4.19.89/kernel/drivers/xenomai/net/stack/rtnet.ko: Function not
> >>> implemented

> >> Has anybody a hint how to build/ load RTnet kernel module properly?

>> Can you load any other modules? Did you include "loadable module support" in
> > your kernel config?

> > If you do a simple "lsmod", does it say anything about other loaded modules ?


> >> Thanks
> >> Benji


> > Per Öberg


> Loading other modules is possible. But rtnet is not listed as a loadable
> module, see below.
> In kernel config 'MODULE_UNLOAD' and 'MODULES' are set.

> > Module Size Used by
> > snd_hda_codec_hdmi 49152 1
> > snd_hda_codec_realtek 110592 1
> > snd_hda_codec_generic 73728 1 snd_hda_codec_realtek
> > rfcomm 69632 16
> > cmac 16384 1
> > bnep 20480 2
> > intel_rapl 20480 0
> > x86_pkg_temp_thermal 16384 0
> > intel_powerclamp 16384 0
> > coretemp 16384 0
> > arc4 16384 2
> > i915 1703936 6
> > iwlmvm 372736 0
> > mac80211 786432 1 iwlmvm
> > kvm_intel 184320 0
> > kvm 622592 1 kvm_intel
> > iwlwifi 303104 1 iwlmvm
> > cec 49152 1 i915
> > rc_core 45056 1 cec
> > drm_kms_helper 167936 1 i915
> > snd_hda_intel 40960 3
> > ...

Then I would say that you have a mismatch between the versioning information in your module and kernel build. Are they built together or separately?

Can you please provide information from "uname -a" and "cat /proc/version"  ?


> Thanks
> Benji

Best regards
Per Öberg