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Distribution kernel maintainers routinely backport fixes for users that were deemed important but not "something critical" as defined by the rules. To users of these kernels they are very serious and failing to fix them reduces the value of -stable. The problem is that the patches fixing these issues are often subtle and prone to regressions in other ways and need greater care and attention. To combat this, these "serious" backports should have a higher barrier to entry. This patch relaxes the rules to allow a distribution maintainer to merge to -stable a backported patch or small series that fixes a "serious" user-visible performance issue. They should include additional information on the user-visible bug affected and a link to the bugzilla entry if available. The same rules about the patch being already in mainline still apply. Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
96 lines
4.4 KiB
Plaintext
96 lines
4.4 KiB
Plaintext
Everything you ever wanted to know about Linux -stable releases.
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Rules on what kind of patches are accepted, and which ones are not, into the
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"-stable" tree:
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- It must be obviously correct and tested.
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- It cannot be bigger than 100 lines, with context.
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- It must fix only one thing.
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- It must fix a real bug that bothers people (not a, "This could be a
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problem..." type thing).
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- It must fix a problem that causes a build error (but not for things
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marked CONFIG_BROKEN), an oops, a hang, data corruption, a real
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security issue, or some "oh, that's not good" issue. In short, something
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critical.
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- Serious issues as reported by a user of a distribution kernel may also
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be considered if they fix a notable performance or interactivity issue.
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As these fixes are not as obvious and have a higher risk of a subtle
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regression they should only be submitted by a distribution kernel
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maintainer and include an addendum linking to a bugzilla entry if it
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exists and additional information on the user-visible impact.
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- New device IDs and quirks are also accepted.
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- No "theoretical race condition" issues, unless an explanation of how the
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race can be exploited is also provided.
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- It cannot contain any "trivial" fixes in it (spelling changes,
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whitespace cleanups, etc).
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- It must follow the Documentation/SubmittingPatches rules.
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- It or an equivalent fix must already exist in Linus' tree (upstream).
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Procedure for submitting patches to the -stable tree:
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- Send the patch, after verifying that it follows the above rules, to
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stable@vger.kernel.org. You must note the upstream commit ID in the
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changelog of your submission, as well as the kernel version you wish
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it to be applied to.
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- To have the patch automatically included in the stable tree, add the tag
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Cc: stable@vger.kernel.org
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in the sign-off area. Once the patch is merged it will be applied to
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the stable tree without anything else needing to be done by the author
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or subsystem maintainer.
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- If the patch requires other patches as prerequisites which can be
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cherry-picked than this can be specified in the following format in
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the sign-off area:
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Cc: <stable@vger.kernel.org> # 3.3.x: a1f84a3: sched: Check for idle
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Cc: <stable@vger.kernel.org> # 3.3.x: 1b9508f: sched: Rate-limit newidle
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Cc: <stable@vger.kernel.org> # 3.3.x: fd21073: sched: Fix affinity logic
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Cc: <stable@vger.kernel.org> # 3.3.x
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Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The tag sequence has the meaning of:
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git cherry-pick a1f84a3
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git cherry-pick 1b9508f
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git cherry-pick fd21073
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git cherry-pick <this commit>
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- The sender will receive an ACK when the patch has been accepted into the
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queue, or a NAK if the patch is rejected. This response might take a few
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days, according to the developer's schedules.
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- If accepted, the patch will be added to the -stable queue, for review by
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other developers and by the relevant subsystem maintainer.
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- Security patches should not be sent to this alias, but instead to the
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documented security@kernel.org address.
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Review cycle:
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- When the -stable maintainers decide for a review cycle, the patches will be
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sent to the review committee, and the maintainer of the affected area of
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the patch (unless the submitter is the maintainer of the area) and CC: to
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the linux-kernel mailing list.
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- The review committee has 48 hours in which to ACK or NAK the patch.
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- If the patch is rejected by a member of the committee, or linux-kernel
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members object to the patch, bringing up issues that the maintainers and
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members did not realize, the patch will be dropped from the queue.
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- At the end of the review cycle, the ACKed patches will be added to the
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latest -stable release, and a new -stable release will happen.
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- Security patches will be accepted into the -stable tree directly from the
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security kernel team, and not go through the normal review cycle.
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Contact the kernel security team for more details on this procedure.
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Trees:
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- The queues of patches, for both completed versions and in progress
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versions can be found at:
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http://git.kernel.org/?p=linux/kernel/git/stable/stable-queue.git
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- The finalized and tagged releases of all stable kernels can be found
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in separate branches per version at:
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http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git
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Review committee:
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- This is made up of a number of kernel developers who have volunteered for
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this task, and a few that haven't.
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