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* Documentation: kprobetrace: Fix some typosYoann Congal2023-01-241-8/+9
| | | | | | | | | | | | | | | | * Uncapitalise tracepoint * Hyphen in *-based * Plurals * fetch-args -> fetchargs * 2bytes hex -> 2-byte hex * .. -> . * arch -> architecture Signed-off-by: Yoann Congal <yoann.congal@smile.fr> Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Link: https://lore.kernel.org/r/20230121225304.1711635-2-yoann.congal@smile.fr Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* x86/vsyscall: Fix documentation to reflect the default modeSohil Mehta2023-01-191-4/+4
| | | | | | | | | | | | | The default vsyscall mode has been updated from emulate to xonly for a while. Update the kernel-parameters doc to reflect that. Fixes: 625b7b7f79c6 ("x86/vsyscall: Change the default vsyscall mode to xonly") Cc: Andy Lutomirski <luto@kernel.org> Signed-off-by: Sohil Mehta <sohil.mehta@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230111193211.1987047-1-sohil.mehta@intel.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* docs/zh_CN: Add a glossary of Chinese translation termsYanteng Si2023-01-192-0/+45
| | | | | | | | | | | | | As more and more documents are translated and some English words are translated into different Chinese, it seems that we need a glossary of Chinese translation terms. Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Alex Shi <alexs@kernel.org> Reviewed-by: Tang Yizhou <tangyeechou@gmail.com> Acked-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/20230117093416.2262787-1-siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Documentation: Avoid duplicate Kconfig inclusionPeter Foley2023-01-192-4/+8
| | | | | | | | | | | Documentation/Kconfig is already included from top-level, avoid including it again from lib/Kconfig.debug. Signed-off-by: Peter Foley <pefoley2@pefoley.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20230114-doc-v2-1-853a8434ac95@pefoley.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Merge branch 'docs-fixes' into docs-mwJonathan Corbet2023-01-132-3/+15
|\ | | | | | | | | Bring the 6.2 fixes into the development branch as well to avoid build problems.
| * docs/conf.py: Use about.html only in sidebar of alabaster themeAkira Yokosawa2023-01-111-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "about.html" is available only for the alabaster theme [1]. Unconditionally putting it to html_sidebars prevents us from using other themes which respect html_sidebars. Remove about.html from the initialization and insert it at the front for the alabaster theme. Link: [1] https://alabaster.readthedocs.io/en/latest/installation.html#sidebars Fixes: d5389d3145ef ("docs: Switch the default HTML theme to alabaster") Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Link: https://lore.kernel.org/r/4b162dbe-2a7f-1710-93e0-754cf8680aae@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * docs: Deprecate use of Sphinx < 2.4.xJonathan Corbet2023-01-061-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Sphinx 2.4 release is three years old, and it is becoming increasingly difficult to even find a system with an sufficiently archaic Python installation that can run versions older than that. I can no longer test changes against anything prior to 2.4.x. Move toward raising our minimum Sphinx requirement to 2.4.x so we can delete some older support code and claim to support a range of versions that we can actually test. In the absence of screams, the actual removal of support can happen later in 2023. Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| * docs: Fix the docs build with Sphinx 6.0Jonathan Corbet2023-01-061-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | Sphinx 6.0 removed the execfile_() function, which we use as part of the configuration process. They *did* warn us... Just open-code the functionality as is done in Sphinx itself. Tested (using SPHINX_CONF, since this code is only executed with an alternative config file) on various Sphinx versions from 2.5 through 6.0. Reported-by: Martin Liška <mliska@suse.cz> Cc: stable@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/sp_SP: Add process kernel-enforcement-statement.rst translationCarlos Bilbao2023-01-132-0/+175
| | | | | | | | | | | | | | | | | | | | Translate the following document into Spanish: - process/kernel-enforcement-statement.rst Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/20230103165608.134190-1-carlos.bilbao@amd.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: deprecated.rst: Add note about DECLARE_FLEX_ARRAY() usageKees Cook2023-01-131-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | There wasn't any mention of when/where DECLARE_FLEX_ARRAY() should be used, so add the rationale and an example to the deprecation docs. Suggested-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Cc: "Gustavo A. R. Silva" <gustavoars@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230106200600.never.735-kees@kernel.org [jc: minor wording tweaks] Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | doc:it_IT: add translation for botching-up-ioctl.rstFederico Vaga2023-01-132-0/+250
| | | | | | | | | | | | | | | | This patch adds the translation for the botching up ioctl document. Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20230102183716.9698-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | doc:it_IT: fix of 2 typosFabio Fantoni2023-01-132-2/+2
| | | | | | | | | | | | | | | | | | Fix of 2 typos spotted reading documentation in italian Signed-off-by: Fabio Fantoni <fantonifabio@tiscali.it> Acked-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20230101155548.12350-1-fantonifabio@tiscali.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: process: Document suitability of Proton Mail for kernel ↵Conor Dooley2023-01-131-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | development Proton Mail automatically picks up PGP keys for those with kernel.org accounts (and other domains!) which provide WKD for their users & uses them to encrypt emails, including patches. Document the behaviour & Proton Mail's unsuitability for kernel development. Reviewed-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20221231152320.1340874-1-conor@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | doc:it_IT: align Italian documentationFederico Vaga2023-01-1311-91/+127
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Translation for the following patches commit da4288b95baa ("scripts/check-local-export: avoid 'wait $!' for process substitution") commit 5372de4e4545 ("docs/doc-guide: Put meta title for kernel-doc HTML page") commit 4d627ef12b40 ("docs/doc-guide: Mention make variable SPHINXDIRS") commit 7c43214dddfd ("docs/doc-guide: Add footnote on Inkscape for better images in PDF documents") commit 615041d42a1a ("docs: kernel-docs: shorten the lengthy doc title") commit cbf4adfd4d19 ("Documentation: process: Update email client instructions for Thunderbird") commit e72b3b9810dd ("maintainer-pgp-guide: minor wording tweaks") commit ea522496afa1 ("Documentation: process: replace outdated LTS table w/ link") commit 93431e0607e5 ("Replace HTTP links with HTTPS ones: documentation") commit e648174b53f1 ("Documentation: Fix spelling mistake in hacking.rst") commit 602684adb42a ("docs: Update version number from 5.x to 6.x in README.rst") commit 489876063fb1 ("docs: add a man-pages link to the front page") commit 0c7b4366f1ab ("docs: Rewrite the front page") Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20221231130849.4675-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | doc:it_IT: fix typo in email-clientFederico Vaga2023-01-131-1/+1
| | | | | | | | | | | | | | | | `usato` becomes `usando` Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Link: https://lore.kernel.org/r/20221230172456.58745-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | doc: fix typo in botching up ioctlsFederico Vaga2023-01-131-1/+1
| | | | | | | | | | | | | | | | | | The type contained a typo `uintprt` -> `uintptr` Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it> Acked-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/20221230172328.58612-1-federico.vaga@vaga.pv.it Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: x86: fix typo in x86_64/mm.rstWang Yong2023-01-031-1/+1
| | | | | | | | | | | | | | | | change "64Gb" to "64GB". Signed-off-by: Wang Yong <yongw.kernel@gmail.com> Link: https://lore.kernel.org/r/20221228100141.382325-1-yongw.kernel@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: maintainer-pgp-guide: update for latest gnupg defaultsKonstantin Ryabitsev2023-01-031-72/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is finally becoming increasingly rare to find a distribution that still ships with gnupg-1.x, so remove the last vestiges of "gpg" vs "gpg2" from documentation. Similarly, starting with GnuPG 2.2 and above, the default --gen-key operation creates ed25519/cv25519 keypairs, so update all example command outputs to use that combination instead of rsa2048. Lastly, add a few wording tweaks and remove links that lead to stale information (e.g. hardware tokens overview from 2017). Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Link: https://lore.kernel.org/r/20221220-docs-pgp-guide-v1-1-9b0c0bf974fb@linuxfoundation.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: ftrace: fix a issue with duplicated subtitle numberDonglin Peng2023-01-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | The subtitle "5.3 Clearing filters" and "5.3 Subsystem filters" has the same index number, let's fix it. Fixes: 95b696088c1c ("tracing/filters: add filter Documentation") Signed-off-by: Donglin Peng <dolinux.peng@gmail.com> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Link: https://lore.kernel.org/r/20221209025119.1371570-1-dolinux.peng@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: proc.rst: add softnet_stat to /proc/net tableYang Yang2023-01-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | /proc/net/softnet_stat exists for a long time, but proc.rst miss it. Softnet_stat shows some statistics of struct softnet_data of online CPUs. Struct softnet_data manages incoming and output packets on per-CPU queues. Note that fastroute and cpu_collision in softnet_stat are obsolete and their value is always 0. Signed-off-by: Yang Yang <yang.yang29@zte.com.cn> Reviewed-by: xu xin <xu.xin16@zte.com.cn> Reviewed-by: Zhang Yunkai <zhang.yunkai@zte.com.cn> Link: https://lore.kernel.org/r/202212091421536982085@zte.com.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: fix a typo in howtoWang Yong2023-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | Fix a typo in Chinese translation of howto.rst Fixes: 40d93e496180 ("docs/zh_CN: update howto.rst to latest version") Signed-off-by: Wang Yong <yongw.kernel@gmail.com> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Link: https://lore.kernel.org/r/20221208083353.160152-1-yongw.kernel@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs: mm/page_owner: fix spelling mistakesChen Xiao2023-01-031-2/+2
| | | | | | | | | | | | | | | | | | Fix several spelling mistakes in page_owner documentation. Signed-off-by: Chen Xiao <abigwc@gmail.com> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Link: https://lore.kernel.org/r/1670479443-8484-1-git-send-email-abigwc@gmail.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/sp_SP: Add process code-of-conduct.rst translationCarlos Bilbao2023-01-032-0/+98
| | | | | | | | | | | | | | | | | | | | Translate the following document into Spanish: - process/code-of-conduct.rst Signed-off-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/20221204000109.17224-1-bilbao@vt.edu Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Documentation: admin: move OOO entries in kernel-parameters.txtRandy Dunlap2023-01-031-61/+61
| | | | | | | | | | | | | | | | | | | | | | | | Fix the most blatant out-of-order entries in kernel-parameters.txt. No changes other than modifying the order of the entries. 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/20221204013050.11496-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of energy-model to 6.1-rc8Yanteng Si2023-01-031-8/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit c5d39fae8992 ("Documentation: EM: Switch to micro-Watts scale") commit f48a0c475c2a ("Documentation: EM: Describe new registration method using DT") commit 75a3a99a5a98 ("PM: EM: Change the order of arguments in the .active_power() callback") commit 015f569c4649 ("Documentation: EM: Add artificial EM registration description") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/06df12357d64d602a4dfb10a025a7520daeb3ba0.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of msi-howto to 6.1-rc8Yanteng Si2023-01-031-0/+11
| | | | | | | | | | | | | | | | | | | | Update to commit 88614075a952 ("Documentation: PCI: Add reference to PCI/MSI device driver APIs") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/a47eb583fc396cd936a27749c318557284855936.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of ksm to 6.1-rc8Yanteng Si2023-01-031-0/+50
| | | | | | | | | | | | | | | | | | | | | | | | Update to commit 21b7bdb504ae ("ksm: add profit monitoring documentation") commit 94bfe85bde18 ("mm/vmstat: add events for ksm cow") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/4d11b3d7b7223c16b38ef913a6a6de108a0886d3.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of usage to 6.1-rc8Yanteng Si2023-01-031-18/+50
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit 1da89ea0b006 ("Docs/admin-guide/mm/damon/usage: document schemes/<s>/tried_regions sysfs directory") commit 465d0eb0dc31 ("Docs/admin-guide/mm/damon/usage: fix the example code snip") commit f1f3afd59d78 ("Docs/admin-guide/mm/damon/usage: note DAMON debugfs interface deprecation plan") commit 9056a2229495 ("Docs/admin-guide/mm/damon/usage: describe the rules of sysfs region directories") commit c3774845541e ("Docs/admin-guide/mm/damon/usage: fix wrong usage example of init_regions file") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/8c96013940845a9c59b5b607c0a98b5d4cd53636.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of start to 6.1-rc8Yanteng Si2023-01-031-10/+2
| | | | | | | | | | | | | | | | | | | | Update to commit 04cc7e4bf7c4 ("Docs/admin-guide/mm/damon/start: mention the dependency as sysfs instead of debugfs") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/166422a66dd1985f8da9fa9f2ef7bfd57439923f.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of reclaim to 6.1-rc8Yanteng Si2023-01-031-4/+0
| | | | | | | | | | | | | | | | | | | | Update to commit 205498012513 ("Docs/admin-guide/damon/reclaim: remove a paragraph that been obsolete due to online tuning support") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/6f85da692baee63696e2680d5dd57c158bfbe0a6.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of testing-overview to 6.1-rc8Yanteng Si2023-01-031-0/+27
| | | | | | | | | | | | | | | | | | | | Update to commit a32d5c0fc12b ("Documentation: dev-tools: Enhance static analysis section with discussion") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/f3ae5e63502fed7e904f5a801168d2324c71f014.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of kasan to 6.1-rc8Yanteng Si2023-01-031-33/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit cd36d84d2571 ("kasan: allow sampling page_alloc allocations for HW_TAGS") Commit 80b92bfe3bb7 ("kasan: dynamically allocate stack ring entries") Commit 7ebfce331251 ("kasan: support kasan.stacktrace for SW_TAGS") Commit ca89f2a2e66d ("kasan: move boot parameters section in documentation") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/824d1cea864dac3ef78c0911c2c5a238f36c55ad.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of page_owner to 6.1-rc8Yanteng Si2023-01-031-14/+3
| | | | | | | | | | | | | | | | | | | | Update to commit 0719fdba5483 ("Documentation/mm/page_owner.rst: delete frequently changing experimental data"). Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/f7a7b03a09a184c080f804d9bb89d0cc55750900.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of highmem to 6.1-rc8Yanteng Si2023-01-031-3/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit a9e9c93966af ("Documentation/mm: add details about kmap_local_page() and preemption"). Commit 84b86f6054c4 ("Documentation/mm: rrefer kmap_local_page() and avoid kmap()"). Commit 6b3afe2eeec2 ("Documentation/mm: avoid invalid use of addresses from kmap_local_page()"). Commit 516ea046ec55 ("Documentation/mm: don't kmap*() pages which can't come from HIGHMEM"). Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/50db59505546b035a03f4ae48d3c18e6116f9e3c.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of mm-api to 6.1-rc8Yanteng Si2023-01-031-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit def76fd549c5 ("mm/page_alloc: remove obsolete gfpflags_normal_context()"). Commit 7343f2b0db49 ("headers/deps: mm: align MANITAINERS and Docs with new gfp.h structure") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/66edf54c706aaf416b5a59c0169a989a7c803e1f.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of kernel-api to 6.1-rc8Yanteng Si2023-01-031-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Update to commit d28a1de5d112 ("math64: favor kernel-doc from header files"). Commit 03699f271de1 ("string: Rewrite and add more kern-doc for the str*() functions"). Commit 31970608a6d3 ("overflow: Fix kern-doc markup for functions") Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Reviewed-by: Wu XiangCheng <bobwxc@email.cn> Link: https://lore.kernel.org/r/46930487845717a6a718dbb6493864dee125ea1b.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | docs/zh_CN: Update the translation of delay-accounting to 6.1-rc8Yanteng Si2023-01-031-2/+5
| | | | | | | | | | | | | | | | | | | | | | Update to commit f347c9d2697f ("filemap: make the accounting of thrashing more consistent"). Commit 662ce1dc9caf ("delayacct: track delays from write-protect copy"). Signed-off-by: Yanteng Si <siyanteng@loongson.cn> Link: https://lore.kernel.org/r/798990521e991697f9f2b75f4dc4a485d31c1311.1670642548.git.siyanteng@loongson.cn Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* | Linux 6.2-rc2v6.2-rc2Linus Torvalds2023-01-011-1/+1
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* | Merge tag 'perf_urgent_for_v6.2_rc2' of ↵Linus Torvalds2023-01-012-38/+18
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fixes from Borislav Petkov: - Pass only an initialized perf event attribute to the LSM hook - Fix a use-after-free on the perf syscall's error path - A potential integer overflow fix in amd_core_pmu_init() - Fix the cgroup events tracking after the context handling rewrite - Return the proper value from the inherit_event() function on error * tag 'perf_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/core: Call LSM hook after copying perf_event_attr perf: Fix use-after-free in error path perf/x86/amd: fix potential integer overflow on shift of a int perf/core: Fix cgroup events tracking perf core: Return error pointer if inherit_event() fails to find pmu_ctx
| * | perf/core: Call LSM hook after copying perf_event_attrNamhyung Kim2022-12-271-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It passes the attr struct to the security_perf_event_open() but it's not initialized yet. Fixes: da97e18458fb ("perf_event: Add support for LSM and SELinux checks") Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20221220223140.4020470-1-namhyung@kernel.org
| * | perf: Fix use-after-free in error pathPeter Zijlstra2022-12-271-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The syscall error path has a use-after-free; put_pmu_ctx() will reference ctx, therefore we must ensure ctx is destroyed after pmu_ctx is. Fixes: bd2756811766 ("perf: Rewrite core context handling") Reported-by: syzbot+b8e8c01c8ade4fe6e48f@syzkaller.appspotmail.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Chengming Zhou <zhouchengming@bytedance.com> Link: https://lkml.kernel.org/r/Y6B3xEgkbmFUCeni@hirez.programming.kicks-ass.net
| * | perf/x86/amd: fix potential integer overflow on shift of a intColin Ian King2022-12-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The left shift of int 32 bit integer constant 1 is evaluated using 32 bit arithmetic and then passed as a 64 bit function argument. In the case where i is 32 or more this can lead to an overflow. Avoid this by shifting using the BIT_ULL macro instead. Fixes: 471af006a747 ("perf/x86/amd: Constrain Large Increment per Cycle events") Signed-off-by: Colin Ian King <colin.i.king@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Ian Rogers <irogers@google.com> Acked-by: Kim Phillips <kim.phillips@amd.com> Link: https://lore.kernel.org/r/20221202135149.1797974-1-colin.i.king@gmail.com
| * | perf/core: Fix cgroup events trackingChengming Zhou2022-12-271-32/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We encounter perf warnings when using cgroup events like: cd /sys/fs/cgroup mkdir test perf stat -e cycles -a -G test Which then triggers: WARNING: CPU: 0 PID: 690 at kernel/events/core.c:849 perf_cgroup_switch+0xb2/0xc0 Call Trace: <TASK> __schedule+0x4ae/0x9f0 ? _raw_spin_unlock_irqrestore+0x23/0x40 ? __cond_resched+0x18/0x20 preempt_schedule_common+0x2d/0x70 __cond_resched+0x18/0x20 wait_for_completion+0x2f/0x160 ? cpu_stop_queue_work+0x9e/0x130 affine_move_task+0x18a/0x4f0 WARNING: CPU: 0 PID: 690 at kernel/events/core.c:829 ctx_sched_in+0x1cf/0x1e0 Call Trace: <TASK> ? ctx_sched_out+0xb7/0x1b0 perf_cgroup_switch+0x88/0xc0 __schedule+0x4ae/0x9f0 ? _raw_spin_unlock_irqrestore+0x23/0x40 ? __cond_resched+0x18/0x20 preempt_schedule_common+0x2d/0x70 __cond_resched+0x18/0x20 wait_for_completion+0x2f/0x160 ? cpu_stop_queue_work+0x9e/0x130 affine_move_task+0x18a/0x4f0 The above two warnings are not complete here since I remove other unimportant information. The problem is caused by the perf cgroup events tracking: CPU0 CPU1 perf_event_open() perf_event_alloc() account_event() account_event_cpu() atomic_inc(perf_cgroup_events) __perf_event_task_sched_out() if (atomic_read(perf_cgroup_events)) perf_cgroup_switch() // kernel/events/core.c:849 WARN_ON_ONCE(cpuctx->ctx.nr_cgroups == 0) if (READ_ONCE(cpuctx->cgrp) == cgrp) // false return perf_ctx_lock() ctx_sched_out() cpuctx->cgrp = cgrp ctx_sched_in() perf_cgroup_set_timestamp() // kernel/events/core.c:829 WARN_ON_ONCE(!ctx->nr_cgroups) perf_ctx_unlock() perf_install_in_context() cpu_function_call() __perf_install_in_context() add_event_to_ctx() list_add_event() perf_cgroup_event_enable() ctx->nr_cgroups++ cpuctx->cgrp = X We can see from above that we wrongly use percpu atomic perf_cgroup_events to check if we need to perf_cgroup_switch(), which should only be used when we know this CPU has cgroup events enabled. The commit bd2756811766 ("perf: Rewrite core context handling") change to have only one context per-CPU, so we can just use cpuctx->cgrp to check if this CPU has cgroup events enabled. So percpu atomic perf_cgroup_events is not needed. Fixes: bd2756811766 ("perf: Rewrite core context handling") Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Ravi Bangoria <ravi.bangoria@amd.com> Link: https://lkml.kernel.org/r/20221207124023.66252-1-zhouchengming@bytedance.com
| * | perf core: Return error pointer if inherit_event() fails to find pmu_ctxRavi Bangoria2022-12-271-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | inherit_event() returns NULL only when it finds orphaned events otherwise it returns either valid child_event pointer or an error pointer. Follow the same when it fails to find pmu_ctx. Fixes: bd2756811766 ("perf: Rewrite core context handling") Reported-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20221118051539.820-1-ravi.bangoria@amd.com
* | Merge tag 'x86_urgent_for_v6.2_rc2' of ↵Linus Torvalds2023-01-013-25/+17
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Borislav Petkov: - Two fixes to correct how kprobes handles INT3 now that they're added by other functionality like the rethunks and not only kgdb - Remove __init section markings of two functions which are referenced by a function in the .text section * tag 'x86_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNK x86/kprobes: Fix kprobes instruction boudary check with CONFIG_RETHUNK x86/calldepth: Fix incorrect init section references
| * | x86/kprobes: Fix optprobe optimization check with CONFIG_RETHUNKMasami Hiramatsu (Google)2022-12-271-20/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the CONFIG_RETHUNK and CONFIG_SLS will use INT3 for stopping speculative execution after function return, kprobe jump optimization always fails on the functions with such INT3 inside the function body. (It already checks the INT3 padding between functions, but not inside the function) To avoid this issue, as same as kprobes, check whether the INT3 comes from kgdb or not, and if so, stop decoding and make it fail. The other INT3 will come from CONFIG_RETHUNK/CONFIG_SLS and those can be treated as a one-byte instruction. Fixes: e463a09af2f0 ("x86: Add straight-line-speculation mitigation") Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/167146051929.1374301.7419382929328081706.stgit@devnote3
| * | x86/kprobes: Fix kprobes instruction boudary check with CONFIG_RETHUNKMasami Hiramatsu (Google)2022-12-271-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the CONFIG_RETHUNK and CONFIG_SLS will use INT3 for stopping speculative execution after RET instruction, kprobes always failes to check the probed instruction boundary by decoding the function body if the probed address is after such sequence. (Note that some conditional code blocks will be placed after function return, if compiler decides it is not on the hot path.) This is because kprobes expects kgdb puts the INT3 as a software breakpoint and it will replace the original instruction. But these INT3 are not such purpose, it doesn't need to recover the original instruction. To avoid this issue, kprobes checks whether the INT3 is owned by kgdb or not, and if so, stop decoding and make it fail. The other INT3 will come from CONFIG_RETHUNK/CONFIG_SLS and those can be treated as a one-byte instruction. Fixes: e463a09af2f0 ("x86: Add straight-line-speculation mitigation") Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/167146051026.1374301.392728975473572291.stgit@devnote3
| * | x86/calldepth: Fix incorrect init section referencesArnd Bergmann2022-12-271-2/+2
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The addition of callthunks_translate_call_dest means that skip_addr() and patch_dest() can no longer be discarded as part of the __init section freeing: WARNING: modpost: vmlinux.o: section mismatch in reference: callthunks_translate_call_dest.cold (section: .text.unlikely) -> skip_addr (section: .init.text) WARNING: modpost: vmlinux.o: section mismatch in reference: callthunks_translate_call_dest.cold (section: .text.unlikely) -> patch_dest (section: .init.text) WARNING: modpost: vmlinux.o: section mismatch in reference: is_callthunk.cold (section: .text.unlikely) -> skip_addr (section: .init.text) ERROR: modpost: Section mismatches detected. Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them. Fixes: b2e9dfe54be4 ("x86/bpf: Emit call depth accounting if required") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20221215164334.968863-1-arnd@kernel.org
* | Merge tag 'locking_urgent_for_v6.2_rc2' of ↵Linus Torvalds2023-01-013-16/+56
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull locking fixes from Borislav Petkov: - Prevent the leaking of a debug timer in futex_waitv() - A preempt-RT mutex locking fix, adding the proper acquire semantics * tag 'locking_urgent_for_v6.2_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: futex: Fix futex_waitv() hrtimer debug object leak on kcalloc error rtmutex: Add acquire semantics for rtmutex lock acquisition slow path
| * | futex: Fix futex_waitv() hrtimer debug object leak on kcalloc errorMathieu Desnoyers2022-12-271-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In a scenario where kcalloc() fails to allocate memory, the futex_waitv system call immediately returns -ENOMEM without invoking destroy_hrtimer_on_stack(). When CONFIG_DEBUG_OBJECTS_TIMERS=y, this results in leaking a timer debug object. Fixes: bf69bad38cf6 ("futex: Implement sys_futex_waitv()") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Davidlohr Bueso <dave@stgolabs.net> Cc: stable@vger.kernel.org Cc: stable@vger.kernel.org # v5.16+ Link: https://lore.kernel.org/r/20221214222008.200393-1-mathieu.desnoyers@efficios.com
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