Based on kernel version 4.1. Page generated on 2015-06-28 12:14 EST.
1 Everything you ever wanted to know about Linux -stable releases. 2 3 Rules on what kind of patches are accepted, and which ones are not, into the 4 "-stable" tree: 5 6 - It must be obviously correct and tested. 7 - It cannot be bigger than 100 lines, with context. 8 - It must fix only one thing. 9 - It must fix a real bug that bothers people (not a, "This could be a 10 problem..." type thing). 11 - It must fix a problem that causes a build error (but not for things 12 marked CONFIG_BROKEN), an oops, a hang, data corruption, a real 13 security issue, or some "oh, that's not good" issue. In short, something 14 critical. 15 - Serious issues as reported by a user of a distribution kernel may also 16 be considered if they fix a notable performance or interactivity issue. 17 As these fixes are not as obvious and have a higher risk of a subtle 18 regression they should only be submitted by a distribution kernel 19 maintainer and include an addendum linking to a bugzilla entry if it 20 exists and additional information on the user-visible impact. 21 - New device IDs and quirks are also accepted. 22 - No "theoretical race condition" issues, unless an explanation of how the 23 race can be exploited is also provided. 24 - It cannot contain any "trivial" fixes in it (spelling changes, 25 whitespace cleanups, etc). 26 - It must follow the Documentation/SubmittingPatches rules. 27 - It or an equivalent fix must already exist in Linus' tree (upstream). 28 29 30 Procedure for submitting patches to the -stable tree: 31 32 - If the patch covers files in net/ or drivers/net please follow netdev stable 33 submission guidelines as described in 34 Documentation/networking/netdev-FAQ.txt 35 - Security patches should not be handled (solely) by the -stable review 36 process but should follow the procedures in Documentation/SecurityBugs. 37 38 For all other submissions, choose one of the following procedures: 39 40 --- Option 1 --- 41 42 To have the patch automatically included in the stable tree, add the tag 43 Cc: email@example.com 44 in the sign-off area. Once the patch is merged it will be applied to 45 the stable tree without anything else needing to be done by the author 46 or subsystem maintainer. 47 48 --- Option 2 --- 49 50 After the patch has been merged to Linus' tree, send an email to 51 firstname.lastname@example.org containing the subject of the patch, the commit ID, 52 why you think it should be applied, and what kernel version you wish it to 53 be applied to. 54 55 --- Option 3 --- 56 57 Send the patch, after verifying that it follows the above rules, to 58 email@example.com. You must note the upstream commit ID in the 59 changelog of your submission, as well as the kernel version you wish 60 it to be applied to. 61 62 Option 1 is probably the easiest and most common. Options 2 and 3 are more 63 useful if the patch isn't deemed worthy at the time it is applied to a public 64 git tree (for instance, because it deserves more regression testing first). 65 Option 3 is especially useful if the patch needs some special handling to apply 66 to an older kernel (e.g., if API's have changed in the meantime). 67 68 Additionally, some patches submitted via Option 1 may have additional patch 69 prerequisites which can be cherry-picked. This can be specified in the following 70 format in the sign-off area: 71 72 Cc: <firstname.lastname@example.org> # 3.3.x: a1f84a3: sched: Check for idle 73 Cc: <email@example.com> # 3.3.x: 1b9508f: sched: Rate-limit newidle 74 Cc: <firstname.lastname@example.org> # 3.3.x: fd21073: sched: Fix affinity logic 75 Cc: <email@example.com> # 3.3.x 76 Signed-off-by: Ingo Molnar <firstname.lastname@example.org> 77 78 The tag sequence has the meaning of: 79 git cherry-pick a1f84a3 80 git cherry-pick 1b9508f 81 git cherry-pick fd21073 82 git cherry-pick <this commit> 83 84 Also, some patches may have kernel version prerequisites. This can be 85 specified in the following format in the sign-off area: 86 87 Cc: <email@example.com> # 3.3.x- 88 89 The tag has the meaning of: 90 git cherry-pick <this commit> 91 92 For each "-stable" tree starting with the specified version. 93 94 Following the submission: 95 96 - The sender will receive an ACK when the patch has been accepted into the 97 queue, or a NAK if the patch is rejected. This response might take a few 98 days, according to the developer's schedules. 99 - If accepted, the patch will be added to the -stable queue, for review by 100 other developers and by the relevant subsystem maintainer. 101 102 103 Review cycle: 104 105 - When the -stable maintainers decide for a review cycle, the patches will be 106 sent to the review committee, and the maintainer of the affected area of 107 the patch (unless the submitter is the maintainer of the area) and CC: to 108 the linux-kernel mailing list. 109 - The review committee has 48 hours in which to ACK or NAK the patch. 110 - If the patch is rejected by a member of the committee, or linux-kernel 111 members object to the patch, bringing up issues that the maintainers and 112 members did not realize, the patch will be dropped from the queue. 113 - At the end of the review cycle, the ACKed patches will be added to the 114 latest -stable release, and a new -stable release will happen. 115 - Security patches will be accepted into the -stable tree directly from the 116 security kernel team, and not go through the normal review cycle. 117 Contact the kernel security team for more details on this procedure. 118 119 Trees: 120 121 - The queues of patches, for both completed versions and in progress 122 versions can be found at: 123 http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git 124 - The finalized and tagged releases of all stable kernels can be found 125 in separate branches per version at: 126 http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git 127 128 129 Review committee: 130 131 - This is made up of a number of kernel developers who have volunteered for 132 this task, and a few that haven't.