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Message #06118
[Bug 1903952] Re: focal:linux-hwe-5.8 lttng-modules dkms failure
*** This bug is a duplicate of bug 1896077 ***
https://bugs.launchpad.net/bugs/1896077
** This bug has been marked a duplicate of bug 1896077
lttng-modules-dkms ADT test failure: build error with kernel >= 5.8
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https://bugs.launchpad.net/bugs/1903952
Title:
focal:linux-hwe-5.8 lttng-modules dkms failure
Status in lttng-modules package in Ubuntu:
New
Status in lttng-modules source package in Focal:
New
Bug description:
Impact: lttng-modules-dkms fail to build on Focal with the linux-
hwe-5.8 kernel.
Fix: Use version 2.12.2 instead of 2.11.2. That would bring it in line
with the version used in groovy.
Testcase: Attempt to build the currently-available 2.11.2 - observe
that it fails. Create a new package using the groovy source package,
confirm that it builds and installs successfully. Furthermore, I was
able to successfully manually modprobe all the .ko files that were
built.
Regression potential: Technically this doesn't work on the 5.8 hwe kernel in focal right now, so it cannot be any more broken than it currently is. The 2.12.2 version is identical to the one currently used in groovy.
EDIT: The upstream lttng-modules project is compatible and buildable on all >3.0 kernels. The new 2.12.2 code should continue to function fine on the 5.4 kernel.
I confirmed that the this latest package builds and loads without any
errors or warnings on the 5.4 kernel.
So, there is a small potential for regression on the 5.4 kernel - that
would likely indicate an upstream bug in lttng-modules itself.
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