** Description changed:
== SRU REQUEST [Xenial] ==
We are getting lttng module build failures on the HWE 4.10.0 kernel
because we are missing the 4.9 and 4.10 compatibility patches to build
for a 4.10 kernel.
== Fix ==
Apply minimal set of upstream patches to enable 4.9 + 4.10 builds:
769b62a02f62ff8db93f109d9f63a1df6ea9990b
- Fix-unregister-cpu-hotplug-notifier-on-buffer-alloc-.patch
+ Fix-unregister-cpu-hotplug-notifier-on-buffer-alloc-.patch
489de24bfb835022b64c2e71d717eaf333ab3633
- Add-load-unload-messages-to-kernel-log.patch
+ Add-load-unload-messages-to-kernel-log.patch
3e86016420272ce5ef0139ad52f20c83305f0f15
- Fix-update-scsi-instrumentation-for-4.7-kernels.patch
+ Fix-update-scsi-instrumentation-for-4.7-kernels.patch
f3166f27f5e2d2210cec32d68c277940a7473281
- btrfs-instrumentation-update-to-4.10-kernel.patch
+ btrfs-instrumentation-update-to-4.10-kernel.patch
507143bc5de50c0e5493d63fb5c300fa42326842
- timer-instrumentation-adapt-to-ktime_t-without-union.patch
+ timer-instrumentation-adapt-to-ktime_t-without-union.patch
1e36732678d7cc650940b4508031acf2f6ffcd1b
- Adapt-lttng-modules-to-Linux-4.10-cpu-hotplug-state-.patch
+ Adapt-lttng-modules-to-Linux-4.10-cpu-hotplug-state-.patch
+
+ da3b99a6386302158785e1f8fd1679c106850d0e
+ Fix: only include linux/cpuhotplug.h for kernels >= 4.10
+
+ ce4a2f0c273d4077c6eb9e6e0f28379ddaf61382
+ Fix: 4.10 hotplug adaptation backward compat
== Testing ==
Without the fix, lttng modules won't install and build on HWE 4.10
kernels. With the fix, the lttng modules build and also pass the ubuntu
kernel team autotest lttng smoke tests.
Should be tested with xenial 4.4 kernel to ensure backward compatibility
is not broken on the default Xenial kernels
== Regression potential ==
Can potential break lttng.
-------------------------------------------------------------------------
-
Test failed with "Kernel tracer not available"
root@michael:/home/ubuntu/autotest-client-tests/ubuntu_lttng_smoke_test#
./ubuntu_lttng_smoke_test.sh
== lttng smoke test of session create/destroy ==
Session test-kernel-session created.
Traces will be written in /tmp/lttng-kernel-trace-12675-session
PASSED (lttng create)
Session test-kernel-session destroyed
PASSED (lttng destroy)
== lttng smoke test list kernel events ==
Error: Unable to list kernel events: Kernel tracer not available
Error: Command error
FAILED (lttng list --kernel)
FAILED (lttng list --kernel more output expected)
== lttng smoke test trace open/close system calls ==
Session test-kernel-session created.
Traces will be written in /tmp/lttng-kernel-trace-12675-session
PASSED (lttng create)
Error: Event open: Kernel tracer not available (channel channel0, session
test-kernel-session)
Error: Event openat: Kernel tracer not available (channel channel0, session
test-kernel-session)
Error: Event close: Kernel tracer not available (channel channel0, session
test-kernel-session)
FAILED (lttng enable-event)
Session test-kernel-session destroyed
== lttng smoke test trace context switches ==
Session test-kernel-session created.
Traces will be written in /tmp/lttng-kernel-trace-12675-session
PASSED (lttng create)
Error: Event sched_switch: Kernel tracer not available (channel channel0,
session test-kernel-session)
FAILED (lttng enable-event)
Session test-kernel-session destroyed
Summary: 4 passed, 4 failed
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.10.0-14-generic 4.10.0-14.16~16.04.1
ProcVersionSignature: Ubuntu 4.10.0-14.16~16.04.1-generic 4.10.3
Uname: Linux 4.10.0-14-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Wed Mar 29 06:08:00 2017
SourcePackage: linux-hwe-edge
UpgradeStatus: No upgrade log present (probably fresh install)
** Changed in: linux-hwe-edge (Ubuntu)
Status: New => In Progress
** Also affects: lttng-modules (Ubuntu)
Importance: Undecided
Status: New
** Changed in: lttng-modules (Ubuntu)
Status: New => In Progress
** Changed in: lttng-modules (Ubuntu)
Importance: Undecided => Medium
** Changed in: lttng-modules (Ubuntu)
Assignee: (unassigned) => Colin Ian King (colin-king)
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https://bugs.launchpad.net/bugs/1677126
Title:
ubuntu_lttng_smoke_test failed on z-hwe: Kernel tracer not available
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