lttng-modules 2.8.0-1 ADT test failure with linux 4.8.0-11.12

[Andy Whitcroft]

[Impact]
lltng-modules in yakkety is not compatible with a 4.8 kernel and does not build at all. This was fixed with the 2.8.1 stable release update. I cherry-picked just what was required from 2.8.1 for 2.8.0 to build on a 4.8 kernel in this SRU because there are other commits that aren't related to this problem.

[Test Case]
Install the package, if it builds and is usable its a positive step forward.

Testing failed on:
    amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-yakkety-canonical-kernel-team-unstable/yakkety/amd64/l/lttng-modules/20160918_082746@/log.gz
    armhf: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-yakkety-canonical-kernel-team-unstable/yakkety/armhf/l/lttng-modules/20160918_084217@/log.gz
    i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-yakkety-canonical-kernel-team-unstable/yakkety/i386/l/lttng-modules/20160918_083359@/log.gz
    ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-yakkety-canonical-kernel-team-unstable/yakkety/ppc64el/l/lttng-modules/20160918_125351@/log.gz
    s390x: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-yakkety-canonical-kernel-team-unstable/yakkety/s390x/l/lttng-modules/20160918_084041@/log.gz

[Michael Jeanson (mjeanson)]

Hi,

We support the 4.8 kernel in the HEAD our stable-2.8 branch of lttng-modules, we will tag and release 2.8.1 when the final 4.8 kernel is released. In the meantime, you can use the HEAD of this branch or cherry-pick the required commits from https://github.com/lttng/lttng-modules/tree/stable-2.8

Cheers,

Michael

[Robert Hooker (sarvatt)]

lttng-modules (2.8.0-1ubuntu1) yakkety-proposed; urgency=medium

  * Backport upstream stable commits from 2.8.1 to allow compiling on 4.8
    kernels. (LP: #1625072)
     0001-Fix-Add-support-for-4.6.4-rt8-kernel.patch
     0002-Fix-timer-wrapper-support-kernels-4.8.patch
     0003-Fix-update-block-instrumentation-to-compile-on-4.8-k.patch
     0004-Fix-napi-instrumentation-for-4.8-kernels.patch
     0005-Fix-update-mm_vmscan-instrumentation-for-kernel-4.8.patch
     0006-Fix-btrfs-instrumentation-for-4.8-kernel.patch

 -- Robert Hooker <email address hidden> Thu, 01 Dec 2016 09:51:38 -0500

[Robert Hooker (sarvatt)]

Already fixed in zesty.

[Brian Murray (brian-murray)]

Hello Andy, or anyone else affected,

Accepted lttng-modules into yakkety-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/lttng-modules/2.8.0-1ubuntu1 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 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, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

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

[Mattia Rizzolo (mapreri)]

(unsubscribing ubuntu-sponsors; if any more sponsorship is needed please subscribe it again)

[Robert Hooker (sarvatt)]

https://launchpad.net/ubuntu/+source/lttng-modules/2.8.0-1ubuntu1 is working fine here on yakkety.

[Robie Basak (racb)]

10:36 <rbasak> apw, bdmurray: there's no SRU information in bug 1625072. I'm not sure what to check has been tested before releasing, since there's no test plan, and I don't know if a test plan has been considered or accepted by the SRU team.

[Brian Murray (brian-murray)]

Robie - I was expecting the autopkgtests to pass.

http://autopkgtest.ubuntu.com/packages/lttng-modules/yakkety/amd64

[Robert Hooker (sarvatt)]

rbasak: Updated the initial post with SRU info, I will admit I don't know enough about this package to know how to stress test it to be sure there are no regressions in actual functionality, but I wanted to make it so it would at least work instead of failing to build and be 100% useless. Updating to the full stable point releases would be better.

[Colin Ian King (colin-king)]

Here is a lttng smoke test script I'm working on, it works for Zesty, so should be a good test to see if lttng basic functionality works:

sudo apt-get update
sudo apt-get install build-essential babeltrace lttng-tools lttng-modules-dkms liblttng-ust-dev

And run the attaches script with sudo

[Stefan Bader (smb)]

Linux isd-maasc02 4.8.0-37-generic #39-Ubuntu
ii lttng-modules-dkms 2.8.0-1ubuntu1

Running above test script: Summary: 14 passed, 0 failed.

[Launchpad Janitor (janitor)]

This bug was fixed in the package lttng-modules - 2.8.0-1ubuntu1

---------------
lttng-modules (2.8.0-1ubuntu1) yakkety; urgency=medium

  * Backport upstream stable commits from 2.8.1 to allow compiling on 4.8
    kernels. (LP: #1625072)
     0001-Fix-Add-support-for-4.6.4-rt8-kernel.patch
     0002-Fix-timer-wrapper-support-kernels-4.8.patch
     0003-Fix-update-block-instrumentation-to-compile-on-4.8-k.patch
     0004-Fix-napi-instrumentation-for-4.8-kernels.patch
     0005-Fix-update-mm_vmscan-instrumentation-for-kernel-4.8.patch
     0006-Fix-btrfs-instrumentation-for-4.8-kernel.patch

 -- Robert Hooker <email address hidden> Thu, 01 Dec 2016 09:51:38 -0500

[Brian Murray (brian-murray)]

The verification of the Stable Release Update for lttng-modules has completed successfully and the package has now been 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.