Tool does not work on ubuntu 18.04 with GA kernel about procmon-for-linux

[WSLUser]

I would consider the kernel version you get from apt upgrade to be standard for Ubuntu. Doesn't matter it's not the initial one when Ubuntu 18.04 releases. I would consider GA to be the latest available from the Ubuntu repositories for that distro version.

[skyrider223]

Hello @VMinute,

Maybe your kernel is too old ?
Linux valterP52S 4.15.(...) < HINT: bpf_get_stack missing (added in Linux 4.18)

Cheers,

[VMinute]

For sure my kernel is too old, I hoped it was clear in the message :)
But this is the standard kernel for ubuntu 18.04. You may update it (I will probably try as soon as I'll not have too many urgent things to finish), but that is not the standard.
So having "ubuntu 18.04" as a requirement is misleading.
Maybe the ubuntu package itself could check kernel version and give a warning?

[MarioHewardt]

You are correct, apologies for that. One particular capability of procmon is collection of stack traces and this does indeed require 4.19 (most other capabilities should work on 4.15). One approach here would be to have procmon check the kernel version and only enable the capabilities that the kernel supports (to some degree at least, not sure if we want to get too granular).

[tigros]

i had this problem too so discovered ukuu and put 5.7.1 but same symptoms then tried 4.20.17 and it works. i just thought 5.7.1 issue might be of interest.

[VMinute]

I regularly do apt upgrade of my system, but kernel version didn't change.
You have to install the HWE kernel to update it, but I would not consider that part of a "standard" update procedure.
Specifying Ubuntu 18.04.4 or Ubuntu 18.04 with kernel v XXX would make the documentation better, IMVHO.

[cmaritan]

Hello everyone, could it be useful to:

1. Update docs

2. Add a check on kernel version at runtime using "sys/utsname.h" and stop execution if does not match requirements (ver. < 4.18)

3. Add a check on kernel version in CMake. Maybe only a warning (It compiles but will not work in the system where it has been built).

I'm a beginner but I can try to submit PR if It's ok for @jahabibi , @TETRA2000 and @josalem (btw: are you the maintainers of the project?).

Bye.

[MarioHewardt]

Thanks for the feedback @cmaritan. We're doing some work in terms of making the capabilities of the different kernels more user friendly in procmon. Stay tuned on that. For the time being though, if you want to create a PR for doc changes that would be much appreciated. Please add @MarioHewardt to the PR (@MarioHewardt, @jahabibi, @josalem are the maintainers).

[MarioHewardt]

This should be fixed with procmon 1.1