On 10/1/20 1:39 AM, Thorsten Leemhuis wrote: > Handle stable and longterm kernels in a subsection, as dealing with them > directly in the main part of the step-by-step guide turned out to make > it messy and hard to follow: it looked a bit like code with a large > amount of if-then-else section to handle special cases, which made the > default code-flow hard to understand. > > Yet again each step will later be repeated in a reference section and > described in more detail. > > Signed-off-by: Thorsten Leemhuis <linux@xxxxxxxxxxxxx> > --- > Documentation/admin-guide/reporting-bugs.rst | 49 ++++++++++++++++++++ > 1 file changed, 49 insertions(+) > > diff --git a/Documentation/admin-guide/reporting-bugs.rst b/Documentation/admin-guide/reporting-bugs.rst > index 203df36af55f..e0a6f4328e87 100644 > --- a/Documentation/admin-guide/reporting-bugs.rst > +++ b/Documentation/admin-guide/reporting-bugs.rst > @@ -156,6 +156,55 @@ After these preparations you'll now enter the main part: > yourself, if you don't get any help or if it is unsatisfying. > > > +Reporting issues only occurring in older kernel version lines > +------------------------------------------------------------- > + > +This section is for you, if you tried the latest mainline kernel as outlined > +above, but failed to reproduce your issue there; at the same time you want to > +see the issue fixed in older version lines or a vendor kernel that's regularly > +rebased on new stable or longterm releases. If that case follow these steps: > + > + * Prepare yourself for the possibility that going through the next few steps > + might not get the issue solved in older releases: the fix might be too big or > + risky to get backported there. > + > + * Check if the kernel developers still maintain the Linux kernel version line > + you care about: go to `the front-page of kernel.org <https://kernel.org>`_ > + and make sure it mentions the latest release of the particular version line > + without an '[EOL]' tag. Explain somewhere that EOL = End Of Life (in parens). > + > + * Check the `archives of the Linux stable mailing list > + <https://lore.kernel.org/stable/>`_ for existing reports. > + > + * Install the latest release from the particular version line as a vanilla > + kernel. Ensure this kernel is not tainted and still shows the problem, as the > + issue might have already been fixed there. > + > + * Search the Linux kernel version control system for the change that fixed > + the issue in mainline, as its commit message might tell you if the fix is > + scheduled for backporting already. If you don't find anything that way, > + search the appropriate mailing lists for posts that discuss such an issue or > + peer-review possible fixes. That might lead you to the commit with the fix > + or tell you if it's unsuitable for backporting. If backporting was not > + considered at all, join the newest discussion, asking if its in the cards. it's > + > + * Check if you're dealing with a regression that was never present in > + mainline by installing the first release of the version line you care about. > + If the issue doesn't show up with it, you basically need to report the issue > + with this version like you would report a problem with mainline (see above). > + This ideally includes a bisection followed by a search for existing reports > + on the net; with the help of the subject and the two relevant commit-ids. If > + that doesn't turn up anything, write the report; CC or forward the report to > + the stable maintainers, the stable mailing list, and those that authored the those who (?) > + change. Include the shortened commit-id if you found the change that causes > + it. > + > + * One of the former steps should lead to a solution. If that doesn't work out, > + ask the maintainers for the subsystem that seems to be causing the issue for > + advice; CC the mailing list for the particular subsystem as well as the > + stable mailing list. > + > + > .. ############################################################################ > .. Temporary marker added while this document is rewritten. Sections above > .. are new and dual-licensed under GPLv2+ and CC-BY 4.0, those below are old. > -- ~Randy
