lttng-modules-dkms fails to build on jammy with the latest 5.19 kernel

[Andrea Righi]

[Impact]

lttng-modules-dkms fails to build with the latest 5.19 kernel:

/var/lib/dkms/lttng-modules/2.13.1/build/src/probes/../../include/lttng/tracepoint-event-impl.h:133:6: error: conflicting types for ‘trace_sched_switch’; have ‘void(bool, struct task_struct *, struct task_struct *)’ {aka ‘void(_Bool, struct task_struct *, struct task_struct *)’}

(along with other errors, due to the different ABI introduced by 5.19)

[Test case]

 $ sudo apt install lttng-modules-dkms

[Fix]

Cherry pick patches from the version in kinetic to properly support the new ABI (kernels >= 5.19).

[Regression potential]

We may experience regressions with kernels >= 5.19 that are using lttng, previous kernels are not affected by the new ABI changes.

[Andrea Righi (arighi)]

debdiff in attach contains all the cherry picks from kinetic's lttng-modules-dkms to support v5.19 in jammy.

[Andrea Righi (arighi)]

debdiff v2: do not break lttng-probe-random in linux 5.15.

[Łukasz Zemczak (sil2100)]

Hello Andrea, or anyone else affected,

Accepted lttng-modules into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lttng-modules/2.13.1-1ubuntu0.22.04.3 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Łukasz Zemczak (sil2100)]

Hopefully this will also be tested on the GA kernel, right?

[Kleber Sacilotto de Souza (kleber-souza)]

Confirmed that lttng-modules-dkms (2.13.1-1ubuntu0.22.04.3) can be built and installed on ADT with jammy hwe-5.19 kernel:

- amd64: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/l/lttng-modules/20230206_125524_ff72e@/log.gz
- arm64: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/arm64/l/lttng-modules/20230206_130709_ff72e@/log.gz
- ppc64el: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/ppc64el/l/lttng-modules/20230206_123201_ff72e@/log.gz
- s390x: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/s390x/l/lttng-modules/20230206_131453_ff72e@/log.gz

ADT tests were also successful with the GA 5.15 kernel:

- amd64: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/amd64/l/lttng-modules/20230123_131855_11dd0@/log.gz
- arm64: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/arm64/l/lttng-modules/20230123_150522_2311a@/log.gz
- ppc64el: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/ppc64el/l/lttng-modules/20230123_131601_93481@/log.gz
- s390x: https://autopkgtest.ubuntu.com/results/autopkgtest-jammy/jammy/s390x/l/lttng-modules/20230123_132607_2311a@/log.gz

[Launchpad Janitor (janitor)]

This bug was fixed in the package lttng-modules - 2.13.1-1ubuntu0.22.04.3

---------------
lttng-modules (2.13.1-1ubuntu0.22.04.3) jammy; urgency=medium

  * Support kernel 5.19 (LP: #2003082):
    - d/p/0001-fix-mm-page_alloc-fix-tracepoint-mm_page_alloc_zone_.patch
    - d/p/0002-fix-fs-Remove-flags-parameter-from-aops-write_begin-.patch
    - d/p/0003-fix-workqueue-Fix-type-of-cpu-in-trace-event-v5.19.patch
    - d/p/0004-fix-sched-switch-prototype-in-v5.19.patch
    - d/p/0005-fix-block-abi-with-v5.19.patch
    - d/p/0006-fix-mm-abi-with-v5.19.patch
    - d/p/0007-fix-kprobes-abi-with-v5.19.patch
    - debian/lttng-modules-dkms.dkms (update to support v5.19)

 -- Andrea Righi <email address hidden> Tue, 17 Jan 2023 13:30:53 +0000

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for lttng-modules has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.