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2020-12-08docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC meansMathieu Chouquet-Stringer1-5/+18
Here's a patch updating the meaning of TAINT_CPU_OUT_OF_SPEC after Borislav introduced changes in a7e1f67ed29f and upcoming patches in tip. TAINT_CPU_OUT_OF_SPEC now means a bit more what it implies as the flag isn't set just because of a CPU misconfiguration or mismatch. Historically it was for SMP kernel oops on an officially SMP incapable processor but now it also covers CPUs whose MSRs have been incorrectly poked at from userspace, drivers being used on non supported architectures, broken firmware, mismatched CPUs, ... Update documentation and script to reflect that. Signed-off-by: Mathieu Chouquet-Stringer <me@mathieu.digital> Link: https://lore.kernel.org/r/20201202153244.709752-1-me@mathieu.digital Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-10-12Documentation/admin-guide: tainted-kernels: Fix typo occuredNaoki Hayama1-1/+1
Fix typo. s/occured/occurred/ Signed-off-by: Naoki Hayama <naoki.hayama@lineo.co.jp> Link: https://lore.kernel.org/r/20201012082441.5831-1-naoki.hayama@lineo.co.jp Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-07-28Documentation/admin-guide: tainted-kernels: fix spelling mistakeYue Hu1-1/+1
Fix typo "tis" -> "this". Signed-off-by: Yue Hu <huyue2@yulong.com> Link: https://lore.kernel.org/r/20200725022444.10976-1-zbestahu@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-07-05Documentation/admin-guide: tainted-kernels: drop doubled wordRandy Dunlap1-1/+1
Drop the doubled word "the". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Link: https://lore.kernel.org/r/20200704032020.21923-13-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-01-09docs: Revamp tainted-kernels.rst to make it more comprehensibleThorsten Leemhuis1-27/+132
Add a section about decoding /proc/sys/kernel/tainted, create a more understandable intro and a hopefully explain better the tainted flags in bugs, oops or panics messages. Only thing missing then is a table that quickly describes the various bits and taint flags before going into more detail, so add that as well. That table is partly based on a section from Documentation/sysctl/kernel.txt, but a bit more compact. To avoid confusion I added the shortened version to kernel.txt; the same table is used in three different places now: ./tools/debugging/kernel-chktaint, Documentation/admin-guide/tainted-kernels.rst and Documentation/sysctl/kernel.txt During review of v1 (see above) a number of existing issues with the text were raised, like outdated usages as well as incomplete or missing descriptions. Address most of those as well. Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info> [jc: tightened up changelog] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2018-02-19admin-guide: Fix list formatting in tained-kernels.htmlJonathan Neuschäfer1-9/+9
Without this patch, the points 1-9 in the list are rendered as an HTML blockquote containing a list, causing them to be indented further than the rest of the list. While at it, also fix the quotation marks around G and P. Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2016-11-08admin-guide: move tainted kernels info to a separate fileMauro Carvalho Chehab1-0/+59
The tainted kernels info is not directly related to the oops tracing. So, let's move it to a separate file. Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>