Linux Yocto - Revision history

Trevor Woerner: /* Release Cadence */ updated to clarify between the various LTSes and to reflect the current policy

2022-10-20T16:17:18Z

Release Cadence: updated to clarify between the various LTSes and to reflect the current policy

← Older revision		Revision as of 16:17, 20 October 2022
Line 1:		Line 1:
	==Release Cadence==		==Release Cadence==
	Each release of the Yocto Project, roughly ~~'''~~every six months~~'''~~, includes ~~'''two~~ or ~~three~~ versions~~'''~~ of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.		Each release of the Yocto Project, roughly every six months, includes one or more versions of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.

	~~While the timing of Linux kernel~~ releases is ~~the domain of the upstream~~ kernel ~~maintainers and beyond the control of the linux~~-~~yocto maintainers, making version roadmaps predictions at best~~, the ~~Yocto Project commits~~ to ~~providing a '''near-current, LTS [~~[https://www.~~kernel~~.org/~~category/releases~~.~~html 1]] and a latest LTSI''' [~~[https://~~ltsi~~.~~linuxfoundation~~.org/~~software~~/releases~~/ 2~~]~~] linux-yocto version~~ with each release of the ~~Yocto Project~~. The final selection of ~~the~~ versions is made approximately two weeks prior to the feature freeze date for the release.		The [https://ltsi.linuxfoundation.org/software/releases/ LTSI] is a Linux Foundation project that saw its first LTSI kernel released in 2011. The latest LTSI release was 4.14.75-ltsi, released in 2018. The work of the LTSI appears to have been taken over by another LF project: the [https://www.cip-project.org/ Civil Infrastructure Project] (CIP). The Linux kernel maintainers also maintain their own [https://www.kernel.org/category/releases.html LTS] kernels. Historically the Yocto Project tried to provide an LTSI plus a recent kernel.org kernel with each release. More recently the project works to provide at least a kernel.org LTS kernel plus a more recent kernel.org kernel.

			The final selection of which versions to ship in any release is made approximately two weeks prior to the feature freeze date for the release.

	==Prior Releases==		==Prior Releases==

Trevor Woerner: /* Prior Releases */ updated to add entries post-dunfell

2022-10-20T15:41:46Z

Prior Releases: updated to add entries post-dunfell

@@ Line 10: / Line 10: @@
 | align="center" style="background:#f0f0f0;"|'''LTS Kernel Version'''
 | align="center" style="background:#f0f0f0;"|'''Released Kernel Version'''
 |-valign="top"
 |Yocto Project 3.1

Armin Kuster: /* Prior Releases */

2020-03-04T05:58:17Z

Prior Releases

← Older revision		Revision as of 05:58, 4 March 2020
Line 12:		Line 12:
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 3.1		\|Yocto Project 3.1
			\|
	\|linux-yocto_5.4		\|linux-yocto_5.4
			\|
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 3.0		\|Yocto Project 3.0
			\|
			\|linux-yocto_4.19
	\|linux-yocto_5.2		\|linux-yocto_5.2
	~~\|linux-yocto_4.19~~
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 2.7		\|Yocto Project 2.7
			\|
			\|linux-yocto_4.19
	\|linux-yocto_5.0		\|linux-yocto_5.0
	~~\|linux-yocto_4.19~~
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 2.6		\|Yocto Project 2.6

Armin Kuster: /* Prior Releases */

2020-03-04T05:56:11Z

Prior Releases

@@ Line 10: / Line 10: @@
 | align="center" style="background:#f0f0f0;"|'''LTS Kernel Version'''
 | align="center" style="background:#f0f0f0;"|'''Released Kernel Version'''
 |-valign="top"
 |Yocto Project 2.6

Stephen K. Jolley: /* Release Cadence */

2018-10-29T19:51:24Z

Release Cadence

← Older revision		Revision as of 19:51, 29 October 2018
Line 2:		Line 2:
	Each release of the Yocto Project, roughly '''every six months''', includes '''two or three versions''' of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.		Each release of the Yocto Project, roughly '''every six months''', includes '''two or three versions''' of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.

	While the timing of Linux kernel releases is the domain of the upstream kernel maintainers and beyond the control of the linux-yocto maintainers, making version roadmaps predictions at best, the Yocto Project commits to providing a '''near-current, LTS [[https://www.kernel.org/category/releases.html 1]] and a latest LTSI''' [[~~http~~://ltsi.linuxfoundation.org/~~participate-in-ltsi~~/~~ltsi-development-guide~~ 2]] linux-yocto version with each release of the Yocto Project. The final selection of the versions is made approximately two weeks prior to the feature freeze date for the release.		While the timing of Linux kernel releases is the domain of the upstream kernel maintainers and beyond the control of the linux-yocto maintainers, making version roadmaps predictions at best, the Yocto Project commits to providing a '''near-current, LTS [[https://www.kernel.org/category/releases.html 1]] and a latest LTSI''' [[https://ltsi.linuxfoundation.org/software/releases/ 2]] linux-yocto version with each release of the Yocto Project. The final selection of the versions is made approximately two weeks prior to the feature freeze date for the release.

	==Prior Releases==		==Prior Releases==

Stephen K. Jolley: /* Prior Releases */

2018-10-29T18:01:30Z

Prior Releases

← Older revision		Revision as of 18:01, 29 October 2018
Line 10:		Line 10:
	\| align="center" style="background:#f0f0f0;"\|'''LTS Kernel Version'''		\| align="center" style="background:#f0f0f0;"\|'''LTS Kernel Version'''
	\| align="center" style="background:#f0f0f0;"\|'''Released Kernel Version'''		\| align="center" style="background:#f0f0f0;"\|'''Released Kernel Version'''
			\|-valign="top"
			\|Yocto Project 2.6
			\|linux-yocto_4.9
			\|linux-yocto_4.14
			\|linux-yocto_4.18
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 2.5		\|Yocto Project 2.5

Stephen K. Jolley: /* Prior Releases */

2018-05-22T15:49:40Z

Prior Releases

← Older revision		Revision as of 15:49, 22 May 2018
Line 14:		Line 14:
	\|linux-yocto_4.9		\|linux-yocto_4.9
	\|linux-yocto_4.14		\|linux-yocto_4.14
	\|linux-yocto_4.??		\|linux-yocto_4.15
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 2.4		\|Yocto Project 2.4

SaulWold: /* Prior Releases */

2017-11-30T00:03:17Z

Prior Releases

@@ Line 10: / Line 10: @@
 | align="center" style="background:#f0f0f0;"|'''LTS Kernel Version'''
 | align="center" style="background:#f0f0f0;"|'''Released Kernel Version'''
 |-valign="top"
 |Yocto Project 2.3

Stephen K. Jolley: /* Prior Releases */

2017-06-19T21:17:26Z

Prior Releases

← Older revision		Revision as of 21:17, 19 June 2017
Line 14:		Line 14:
	\|linux-yocto_4.1		\|linux-yocto_4.1
	\|linux-yocto_4.9		\|linux-yocto_4.9
	\|linux-yocto_4.10?		\|linux-yocto_4.10
	\|-valign="top"		\|-valign="top"
	\|Yocto Project 2.2		\|Yocto Project 2.2
Line 76:		Line 76:
	\|linux-yocto_2.6		\|linux-yocto_2.6
	\|}		\|}


	==Version Lifecycle / Support==		==Version Lifecycle / Support==

SaulWold at 23:25, 30 November 2016

2016-11-30T23:25:11Z

← Older revision		Revision as of 23:25, 30 November 2016
Line 1:		Line 1:
	==Release Cadence==		==Release Cadence==
	Each release of the Yocto Project, roughly '''every six months''', includes '''two versions''' of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.		Each release of the Yocto Project, roughly '''every six months''', includes '''two or three versions''' of the Linux kernel with a broad range of hardware support. While tooling is provided to use any Linux kernel you wish, the linux-yocto Linux kernel recipes are tested with all the emulated targets, the core hardware BSPs, and some vendor layers.

	While the timing of Linux kernel releases is the domain of the upstream kernel maintainers and beyond the control of the linux-yocto maintainers, making version roadmaps predictions at best, the Yocto Project commits to providing a '''near-current and a latest LTSI''' [[http://ltsi.linuxfoundation.org/participate-in-ltsi/ltsi-development-guide 1]] linux-yocto version with each release of the Yocto Project. The final selection of the versions is made approximately two weeks prior to the feature freeze date for the release.		While the timing of Linux kernel releases is the domain of the upstream kernel maintainers and beyond the control of the linux-yocto maintainers, making version roadmaps predictions at best, the Yocto Project commits to providing a '''near-current, LTS [[https://www.kernel.org/category/releases.html 1]] and a latest LTSI''' [[http://ltsi.linuxfoundation.org/participate-in-ltsi/ltsi-development-guide 2]] linux-yocto version with each release of the Yocto Project. The final selection of the versions is made approximately two weeks prior to the feature freeze date for the release.

	==Prior Releases==		==Prior Releases==
	~~Reviewing prior releases is illustrative of the process~~:		{\|border="1" {{table}}
	* Yocto Project 1.4		\| align="center" style="background:#f0f0f0;"\|'''Yocto Project Release'''
	** linux-yocto_3.4		\| align="center" style="background:#f0f0f0;"\|'''LTSI Kernel Version'''
	** linux-yocto_3.8		\| align="center" style="background:#f0f0f0;"\|'''LTS Kernel Version'''
	* Yocto Project 1.5		\| align="center" style="background:#f0f0f0;"\|'''Released Kernel Version'''
	** linux-yocto_3.4		\|-valign="top"
	** linux-yocto_3.10		\|Yocto Project 2.3
	* Yocto Project 1.6		\|linux-yocto_4.1
	** linux-yocto_3.10		\|linux-yocto_4.9
	** linux-yocto_3.14		\|linux-yocto_4.10?
	* Yocto Project 1.7		\|-valign="top"
	** linux-yocto_3.10		\|Yocto Project 2.2
	** linux-yocto_3.14		\|linux-yocto_4.1
	** linux-yocto_3.17		\|linux-yocto_4.4
	* Yocto Project 1.8		\|linux-yocto_4.8
	** linux-yocto_3.14		\|-valign="top"
	** linux-yocto_3.19		\|Yocto Project 2.1
	* Yocto Project 2.0		\|linux-yocto_4.1
	** linux-yocto_3.14		\|linux-yocto_4.1
	** linux-~~yocto_4~~.1		\|linux-yocto_4.4
			\|-valign="top"
			\|Yocto Project 2.0
			\|linux-yocto_3.14
			\|linux-yocto_3.14
			\|linux-yocto_4.1
			\|-valign="top"
			\|Yocto Project 1.8
			\|linux-yocto_3.14
			\|linux-yocto_3.14
			\|linux-yocto_3.19
			\|-valign="top"
			\|Yocto Project 1.7
			\|linux-yocto_3.10
			\|linux-yocto_3.14
			\|linux-yocto_3.17
			\|-valign="top"
			\|Yocto Project 1.6
			\|linux-yocto_3.10
			\|linux-yocto_3.10
			\|linux-yocto_3.14
			\|-valign="top"
			\|Yocto Project 1.5
			\|linux-yocto_3.4
			\|linux-yocto_3.4
			\|linux-yocto_3.10
			\|-valign="top"
			\|Yocto Project 1.4
			\|linux-yocto_3.4
			\|linux-yocto_3.4
			\|linux-yocto_3.8
			\|-valign="top"
			\|Yocto Project 1.3
			\|linux-yocto_3.0
			\|linux-yocto_3.2
			\|linux-yocto_3.4
			\|-valign="top"
			\|Yocto Project 1.2
			\|linux-yocto_3.0
			\|linux-yocto_3.0
			\|linux-yocto_3.2
			\|-valign="top"
			\|Yocto Project 1.1
			\|linux-yocto_2.6
			\|linux-yocto_2.6
			\|linux-yocto_3.0
			\|-valign="top"
			\|Yocto Project 1.0
			\|
			\|
			\|linux-yocto_2.6
			\|}


	==Version Lifecycle / Support==		==Version Lifecycle / Support==
	While we make every effort to select a longterm Linux kernel for each new release kernel, occasionally our releases do not align with those of the Linux kernel, as was the case with the Yocto Project 1.4 release and the 3.8 kernel. In these cases, the non-longterm kernel version will be dropped in the subsequent release, rather than becoming the next LTSI kernel. This can be seen in the 1.5 release where 3.8 was effectively dropped, 3.4 remained as the LTSI kernel, and 3.10 was added as the new release kernel.		While we make every effort to select a longterm Linux kernel for each new release kernel, occasionally our releases do not align with those of the Linux kernel, as was the case with the Yocto Project 1.4 release and the 3.8 kernel. In these cases, the non-longterm kernel version will be dropped in the subsequent release, rather than becoming the next LTSI kernel. This can be seen in the 1.5 release where 3.8 was effectively dropped, 3.4 remained as the LTSI kernel, and 3.10 was added as the new release kernel.

	In terms of support, the linux-yocto recipes are treated the same as all the other recipes in a given release. They are supported for the life of that release [[http://wiki.yoctoproject.org/wiki/Releases 2]] and the corresponding stable updates [[http://wiki.yoctoproject.org/wiki/Stable_branch_maintenance 3]].		In terms of support, the linux-yocto recipes are treated the same as all the other recipes in a given release. They are supported for the life of that release [[http://wiki.yoctoproject.org/wiki/Releases 3]] and the corresponding stable updates [[http://wiki.yoctoproject.org/wiki/Stable_branch_maintenance 4]].

	==FAQ==		==FAQ==
Line 36:		Line 88:

	==References==		==References==
			# [https://www.kernel.org/category/releases.html Long Term Support Kernel Schedule]
	# [http://ltsi.linuxfoundation.org/participate-in-ltsi/ltsi-development-guide LTSI Development Guide]		# [http://ltsi.linuxfoundation.org/participate-in-ltsi/ltsi-development-guide LTSI Development Guide]
	# [https://wiki.yoctoproject.org/wiki/Releases Yocto Project Releases]		# [https://wiki.yoctoproject.org/wiki/Releases Yocto Project Releases]
	# [https://wiki.yoctoproject.org/wiki/Stable_branch_maintenance Yocto Project Stable Branch Maintenance]		# [https://wiki.yoctoproject.org/wiki/Stable_branch_maintenance Yocto Project Stable Branch Maintenance]