canonical-ubuntu-qa team mailing list archive

[Timo Aaltonen <2096645@xxxxxxxxxxxxxxxxxx>]

Hello Po-Hsu, or anyone else affected,

Accepted lttng-modules into focal-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/lttng-
modules/2.12.5-1ubuntu2~20.04.6 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-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. 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.

** Changed in: lttng-modules (Ubuntu Focal)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/2096645

Title:
  lttng DKMS failed to build on Jammy in sru-20250113 (error:
  conflicting types for 'trace_mm_page_alloc_zone_locked')

Status in ubuntu-kernel-tests:
  New
Status in lttng-modules package in Ubuntu:
  Invalid
Status in lttng-modules source package in Focal:
  Fix Committed
Status in lttng-modules source package in Jammy:
  Fix Committed

Bug description:
  Issue found with Jammy 5.15.0-132.143 in sru-20250113
  The same bug has been found in Focal 5.15.0-132.

  [Impact]

  lttng-modules-dkms does not compile from source in Jammy:

     CC [M]  /var/lib/dkms/lttng-modules/2.13.8/build/src/lib/ringbuffer/ring_buffer_iterator.o
     CC [M]  /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.o
   In file included from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/lttng/define_trace.h:87,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/instrumentation/events/kmem.h:570,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.c:35:
   /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/lttng/tracepoint-event-impl.h:133:6: error: conflicting types for 'trace_mm_page_alloc_zone_locked'; have 'void(struct page *, unsigned int,  int)'
     133 | void trace_##_name(_proto);
         |      ^~~~~~
   /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/instrumentation/events/kmem.h:438:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP'
     438 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(kmem_mm_page, mm_page_alloc_zone_locked,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from ./include/trace/events/kmem.h:9,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.c:24:
   ./include/linux/tracepoint.h:244:28: note: previous definition of 'trace_mm_page_alloc_zone_locked' with type 'void(struct page *, unsigned int,  int,  int)'
     244 |         static inline void trace_##name(proto)                          \
         |                            ^~~~~~
   ./include/linux/tracepoint.h:416:9: note: in expansion of macro '__DECLARE_TRACE'
     416 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
         |         ^~~~~~~~~~~~~~~
   ./include/linux/tracepoint.h:539:9: note: in expansion of macro 'DECLARE_TRACE'
     539 |         DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
         |         ^~~~~~~~~~~~~
   ./include/trace/events/kmem.h:259:1: note: in expansion of macro 'DEFINE_EVENT'
     259 | DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,
         | ^~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:297: /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.o] Error 1

  [ Test case ]

  Install lttng-modules-dkms:

  $ sudo apt install lttng-modules-dkms

  Load the module:

  $ sudo modprobe lttng-test

  This procedure should be repeated for Jammy-GA and Jammy-HWE kernels,
  and for Focal-GA, Focal-HWE kernels.

  [ Fix ]

  Patch the code to properly support 6.8, 5.15 and 5.4 ABI.

  [ Regression potential ]

  We may experience regressions in systems that are using the lttng
  debugging tool.

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