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The Real Time Linux collaborative project was established to help coordinate the efforts around mainlining Preempt RT and ensuring that the maintainers have the ability to continue development work, long-term support and future research of RT. In coordination with the broader community, the workgroup aims to encourage broader adoption of RT, improve testing automation and documentation and better prioritize the development roadmap.
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<WRAP rightalign>[[realtime:rtl:start|Read more about the RTL collaborative project]]</WRAP>
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===== Versions of PREEMPT_RT patches =====


The PREEMPT_RT patch is available for several Linux mainline versions. The most recent versions are:

[[https://cdn.kernel.org/pub/linux/kernel/projects/rt/6.15 | Latest Development Version 6.15-rt]] \\
[[https://cdn.kernel.org/pub/linux/kernel/projects/rt/6.12 | Latest Stable Version 6.12-rt]] \\ 

<WRAP rightalign>[[realtime:preempt_rt_versions|Read more about PREEMPT_RT versions]]</WRAP>

===== Participation =====

The RTL project is looking for people who are interested to work with us
in the areas of testing, documentation and development.

<WRAP rightalign>[[realtime:rtl:participate|Would you like to help?]]</WRAP>

===== Communication =====

The two main communication paths for RT users and developers are:
  * [[realtime:communication:mailinglists|mailing lists]]
  * [[realtime:communication:irc|Internet Relay Chat (IRC)]].

===== Documentation =====

Knowledge of the basic technical mechanisms used in a real-time OS
(RTOS) as well as basic configuration examples of the same eases the
start with this topic.  Further information about important aspects of
real-time application development as well as publications about real
time aid the reader in gaining a deeper understanding of real-time
systems.

<WRAP rightalign>[[realtime:documentation:start|Read more about Documentation]]</WRAP>

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===== Blog =====
  * 2022-11-07 : [[realtime:rtl:blog#lwnnetbetter_cpu_selection_for_timer_expiration|LWN.net: Better CPU selection for timer expiration]]
  * 2022-10-04 : [[realtime:rtl:blog#lwnneta_discussion_on_printk|LWN.net: A discussion on printk()]]
  * 2021-10-01 : [[realtime:rtl:blog#an_update_on_real-time_is_overdue|An update on real-time is overdue]]
  * 2020-12-07 : [[realtime:rtl:blog#the_real-time_endgame_is_moving_quickly_now|The real-time endgame is moving quickly now]]
  * 2020-09-09 : [[realtime:rtl:blog#lwnnetpreparing_for_the_realtime_future|LWN.net: Preparing for the realtime future]]
  * 2020-08-13 : [[realtime:rtl:blog#lwnnetlocal_locks_in_the_kernel|LWN.net: Local locks in the kernel]]
  * 2019-11-12 : [[https://todogroup.org/guides/casestudies/ni/|TODO NI Case study]]
  * 2019-07-21 : [[realtime:rtl:blog#the_jury_has_spoken|The jury has spoken]]
  * 2019-02-27 : [[realtime:rtl:blog#lwnnet_the_secondreal-time_linux_project_s_printk_reimplementation|LWN.net, the second: Real-time Linux Project's printk() reimplementation]]
  * 2019-02-15 : [[realtime:rtl:blog#lwnnetsoftirq_rework_to_improve_softirq_latency|LWN.net: Softirq rework to improve softirq latency]]
  * 2018-10-10 : [[realtime:rtl:blog#we_missed_the_train_-_we_are_taking_the_bus|We missed the train - we are taking the bus]]
  * 2018-08-21 : [[realtime:rtl:blog#guest-blog-post-from-bmw-car-itreal-time-linux-continues-its-way-to-main-line-development-and-beyond|Guest Blog Post from BMW Car IT]]
  * 2018-03-04 : [[realtime:rtl:blog#preempt-rt-history|Preempt-RT history]]
  * 2018-01-04 : [[realtime:rtl:blog#happy-new-year-2018|Happy New Year!]]

===== Past Events =====
  * 2023-11-13 : [[https://lpc.events/event/17/sessions/169/#20231113|Linux Plumbers Real-time and Scheduling Microconference 2023]]
  * 2022-09-13 : [[https://lpc.events/event/16/sessions/144/#20220913|Linux Plumbers Real-time and Scheduling Microconference 2022]]
  * 2021-09-21 : [[https://linuxplumbersconf.org/event/11/sessions/108/#20210921|Linux Plumbers Real-time Microconference 2021]]
  * 2020-08-24 : [[https://linuxplumbersconf.org/event/7/sessions/74/#20200824|Linux Plumbers Real-time Microconference 2020]]
  * 2019-09-30 : Real-Time Summit 2019 in Lyon, France
  * 2019-09-11 : [[https://linuxplumbersconf.org/event/4/sessions/54/#20190911|Linux Plumbers Real-Time Microconference 2019]]
  * 2018-08-06 : [[realtime:events:rt-summit2018:start|Real-Time Summit 2018]] in Edinburgh, UK
  * 2017-10-21 : [[realtime:events:rt-summit2017:start|Real-Time Summit 2017]] in Prague
  * 2016-10-11 : [[realtime:events:rt-summit2016:start|Real-Time Summit 2016]] in Berlin
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