[RELEASE] LTTng-modules 2.9.0 (Linux kernel tracer)

From: Mathieu Desnoyers
Date: Tue Nov 29 2016 - 17:41:26 EST

This is the official announcement of the release of LTTng-modules 2.9.0.
Release name: JoannÃs.

The LTTng modules provide Linux kernel tracing capability to the LTTng
2.9 tracer toolset.

New and Noteworthy for LTTng-modules 2.9:

* Various performance improvements. Tested on x86-64 and ARM32.
* Add bitfield, enumeration, variant, structure, compound
array/sequence types.
* Add custom field support.
* IPv4, IPv6, and TCP header data is now traced with the net_.
* Implement select, pselect6, poll, ppoll, epoll_wait, epoll_pwait,
epoll_ctl, detailed system call tracing.
* The accept4() system call payload detail is now traced on x86-64.
* New "i2c" instrumentation. We introduce the module parameter
"extract_sensitive_payload" for this probe. It is disabled by
default. When enabled, it allows tracing i2c payload information
which may contain sensitive data (e.g. keystrokes).
* When lttng-modules gets built into the kernel image, select
TRACEPOINTS rather than depending on it.

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

The release name "JoannÃs" is named after a Berliner Weisse style
beer from the TrÃfle Noir microbrewery in Rouyn-Noranda. It is a
tangy beer with a distinct pink dress and intense fruit flavor,
thanks to the presence of fresh blackcurrant grown in TÃmiscamingue.


2016-11-29 (National Square Dance Day) LTTng modules 2.9.0
* Performance: add missing unlikely in reserve
* Fix: preemptible and migratable context error handling

Mathieu Desnoyers
EfficiOS Inc.