linux-kernel - [RELEASE] LTTng-modules 2.14.0-rc2 (Linux kernel tracer)

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Message-ID: <cd6c769f-8d56-475a-b12a-f47426348b95@efficios.com>
Date: Wed, 14 May 2025 15:53:55 -0400
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: lttng-dev@...ts.lttng.org, diamon-discuss@...ts.linuxfoundation.org,
 linux-trace-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RELEASE] LTTng-modules 2.14.0-rc2 (Linux kernel tracer)

Hi,

This is a stable release announcement for the LTTng kernel tracer,
an out-of-tree kernel tracer for the Linux kernel.

The LTTng project provides low-overhead, correlated userspace and
kernel tracing on Linux. Its use of the Common Trace Format and a
flexible control interface allows it to fulfill various workloads.

* New in this release

This 2.14.0-rc2 release is a bug fix release in preparation for the
final 2.14 release. The most notable changes are a fix to the
new ring_buffer_flush_or_populate_packet which did not affect x86-64,
but does affect other architecture, causing a snapshot test to fail.

A "nonseekable_open" is introduced to fix python use of the /proc/lttng
file, which affects lttng-modules built against Linux kernels older than
v6.0.

There is an uninitialized variable fix for the experimental CTF2 support,
which only triggers when building against kernels that do not have
CONFIG_INIT_STACK_ALL_ZERO=y, which appears in kernel v5.9.

* Detailed change log:

2025-05-14 LTTng modules 2.14.0-rc2
         * Fix channel_backend lookup during `ring_buffer_flush_or_populate_packet`
         * Fix: Use `nonseekable_open` for proc files
         * Fix: metadata-ctf2: enum mappings are not serialized

Feedback is welcome!

Mathieu

Project website: https://lttng.org
Documentation: https://lttng.org/docs
Download link: https://lttng.org/download

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com