As of commit 3db80c999debbad ("riscv: convert to generic syscall table"),
these architectures no longer rely on include/uapi/asm-generic/unistd.h.
Instead, syscall table headers (syscall_table_{32,64}.h) are generated by
scripts/syscalltbl.sh based on entries in scripts/syscall.tbl, with ABIs
specified in arch/*/kernel/Makefile.syscalls.
For the convenience of developers working with older kernel versions, the
original documentation is fully retained, with new sections added to
cover the scripts/syscall.tbl approach.
Bagas Sanjaya [Thu, 8 May 2025 00:58:39 +0000 (07:58 +0700)]
Documentation: ioctl-number: Update table intro
Introduction paragraph to the ioctl numbers table states that only
ioctls in up to ancient Linux kernel version (v2.6.31) for x86 arch are
listed. This is inaccurate as the table also lists ioctls from non-x86
archs and the kernel is continously developed (currently in v6.x).
Update the paragraph accordingly.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250508005838.8381-2-bagasdotme@gmail.com>
Corrects a spelling mistake in Documentation/trace/coresight/panic.rst
where "incase" was used instead of "in case".
Signed-off-by: Hendrik Hamerlinck <hendrik.hamerlinck@hammernet.be> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250513110931.15072-1-hendrik.hamerlinck@hammernet.be>
Shivam Sharma [Sun, 18 May 2025 17:26:58 +0000 (17:26 +0000)]
docs: admin-guide: fix typos in reporting-issues.rst
Correct pin-point to pinpoint, If that the case to If that is the case,
and its only slightly modified to it's only slightly modified in
Documentation/admin-guide/reporting-issues.rst for proper spelling and grammar.
Signed-off-by: Shivam Sharma <10sharmashivam@gmail.com> Acked-by: Thorsten Leemhuis <linux@leemhuis.info> Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250518172658.6983-1-10sharmashivam@gmail.com>
Jonathan Corbet [Thu, 15 May 2025 09:41:15 +0000 (03:41 -0600)]
Merge tag 'Chinese-doc-6.16-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/alexs/linux into docs-mw
Chinese translation docs for 6.16-rc1 from Alex Shi
This is the Chinese translation subtree for 6.16-rc1. It just
includes few changes:
- MAINTAINERS: Change Yanteng's email address
- docs/zh_CN: Add how-to of Chinese translation
- Add networking translation index
- Docs/zh_CN: Translate msg_zerocopy.rst to Simplified Chinese
Kendra Moore [Mon, 21 Apr 2025 01:02:05 +0000 (21:02 -0400)]
docs: dmaengine: add explanation for DMA_ASYNC_TX capability
This patch replaces the TODO for DMA_ASYNC_TX in the DMA engine
provider documentation. The flag is automatically set by the DMA
framework when a device supports key asynchronous memory-to-memory
operations such as memcpy, memset, xor, pq, xor_val, and pq_val.
It must not be set by drivers directly.
Signed-off-by: Kendra Moore <kendra.j.moore3443@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250421010205.84719-1-kendra.j.moore3443@gmail.com>
Documentation: leds: improve readibility of multicolor doc
When reading the documentation of multicolor leds, the HTML output is
not easy to read. Improve it by adding a few markups, splitting the
console in a dedicated block.
Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250421-leds-doc-v1-1-9a32df7fc6f4@yoseli.org>
Fix a minor grammar issue by changing 'firmwares' to 'firmware' in the
Documentation/index.rst file.
Signed-off-by: Alexander Shatalin <sashatalin03@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250430142726.3276-1-sashatalin03@gmail.com>
Akira Yokosawa [Thu, 1 May 2025 08:21:07 +0000 (17:21 +0900)]
docs: Makefile: Inherit PYTHONPYCACHEPREFIX setting as env variable
Commit 6c2f0b28d76e ("docs: Makefile: store __pycache__ at the output
directory") assigns a new path to PYTHONPYCACHEPREFIX for building
kernel documentation.
However, it is not necessarily optimal for everyone.
If you find PYTHONPYCACHEPREFIX is already set, it strongly suggests
that the developer has selected the setting as best suited for one's own
workflow.
Use "?=" in the assignment to PYTHONPYCACHEPREFIX so that the path of
$(abspath $(BUILDDIR)/__pycache__) works only as a safeguard.
Bagas Sanjaya [Fri, 2 May 2025 07:45:05 +0000 (14:45 +0700)]
Documentation: ioctl-number: Update outdated submission info
Much like device numbers that used to be assigned by LANANA (see commit ebdf4040c16df5 ("Documentation: update the devices.txt documentation"),
ioctl numbers list is maintained by general kernel community nowadays
instead of contacting Michael directly as he's long stepped down from
kernel-related activity (his last LKML message was from 2003 [1] and
he's in CREDITS since the beginning of kernel's git history). Also,
patch (including one to update ioctl numbers list) submission now
follows process as described in
Documentation/process/submitting-patches.rst rather than sending
patches directly to Linus as in the distant past.
Joel Savitz [Mon, 21 Apr 2025 16:17:23 +0000 (12:17 -0400)]
docs: namespace: Tweak and reword resource control doc
Fix the document title and reword the phrasing to active voice.
Signed-off-by: Joel Savitz <jsavitz@redhat.com>
Message-ID: <20250421161723.1138903-1-jsavitz@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Adrian Bütler [Sat, 26 Apr 2025 12:23:03 +0000 (14:23 +0200)]
Documentation: x86: Fix a typo in fsgs.rst
Fix a spelling typo in fsgs.rst.
Signed-off-by: Adrian Bütler <buetlera123@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250426122303.15905-1-buetlera123@gmail.com>
Cui Wei [Sat, 26 Apr 2025 13:56:09 +0000 (21:56 +0800)]
Documentation: fix speculation.rst chapter
'Mitigating speculation side-channels' should be a chapter rather
than title.
Signed-off-by: Cui Wei <chris.wei.cui@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20250426135609.735-1-chris.wei.cui@gmail.com>
While the building system doesn't create any Python JIT bytecode,
if one manually runs kernel-doc.py or get_abi.py, Python will,
by default, create a bytecode and store it under scripts/lib/*.
This is normal, and not controlled by the Kernel itself. So,
add *.pyc as an extension to be ignored.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <ae1c54ddacf6ded1f7154897b10798d4b3fdaf96.1745453655.git.mchehab+huawei@kernel.org>
Makefile: move KERNELDOC macro to the main Makefile
As kernel-doc script is used not only on Documentation, but
also on scripts and drivers/drm Makefiles, move it to the
main makefile, as otherwise sub-makefiles may not have it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <bb3ea3b49e76aee51dae7762db10c4d38cd67afe.1745453655.git.mchehab+huawei@kernel.org>
Ammar Askar [Tue, 18 Mar 2025 23:53:31 +0000 (19:53 -0400)]
docs: Fix conflicting contributor identity info
In commit d4563201f33a ("Documentation: simplify and clarify DCO
contribution example language"), the patch submission documentation was
updated to remove the note about pseudonyms and instead simplify it to
allow "known identities".
The process documentation still explicitly prohibits pseudonymous
contributors. This patch changes the process documentation to line up
with the submitting patches document.
Tomas Glozar [Tue, 11 Mar 2025 11:49:36 +0000 (12:49 +0100)]
Documentation/rtla: Include BPF sample collection
Add dependencies needed to build rtla with BPF sample collection support
to README, and document both ways of sample collection in the manpages.
Signed-off-by: Tomas Glozar <tglozar@redhat.com> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Reviewed-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20250311114936.148012-5-tglozar@redhat.com
Tomas Glozar [Tue, 11 Mar 2025 11:49:33 +0000 (12:49 +0100)]
Documentation/rtla: Fix duplicate text about timerlat tracer
A passage about how the timerlat tracer outputs information is included
in both common_timerlat_description.rst and rtla-timerlat.rst, leading
it to be displayed twice in the rtla-timerlat page.
Remove the duplicate passage from rtla-timerlat.rst.
Fixes: 29380d4055e5 ("rtla: Add rtla timerlat documentation") Signed-off-by: Tomas Glozar <tglozar@redhat.com> Reviewed-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20250311114936.148012-2-tglozar@redhat.com
with reference to WARNING:
Duplicate C declaration, also defined at driver-api/usb/gadget:804
There is a function usb_string in the file message.c,
there is also a struct usb_string in the kernel api headers.
The docs is unable to index the function as the index is occupied by struct
This fix adds messgae.c to the usb_core namespace (in docs) hence providing
usb_sting a unique index usb_core.usb_string()
Randy Dunlap [Sat, 5 Apr 2025 00:14:47 +0000 (17:14 -0700)]
cpufreq: editing corrections to cpufreq.rst
Change a few words and abbreviations/punctuation.
Change one echo command to include a trailing '`'.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Viresh Kumar <viresh.kumar@linaro.org> Cc: linux-pm@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20250405001447.4039463-1-rdunlap@infradead.org
James Addison [Mon, 7 Apr 2025 19:51:20 +0000 (21:51 +0200)]
docs: Disambiguate a pair of rST labels
According to the reStructuredText documentation, internal hyperlink
targets[1] are intended to resolve within the current document.
Sphinx has a bug that causes internal hyperlinks declared with
duplicate names to resolve nondeterministically, producing incorrect
documentation. Sphinx does not yet emit a warning when these
duplicate target names are declared.
To improve the reproducibility and correctness of the HTML
documentation, disambiguate two labels both previously titled
"submit_improvements".
docs: automarkup: Move common logic to add and resolve xref to helper
Several of the markup functions contain the same code, calling into
sphinx's pending_xref and resolve_xref functions to add and resolve a
cross-reference, with only a few of the parameters changed (domain,
reference type, markup content). Move this logic to its own function and
reuse it in the markup functions.
Yanteng Si [Fri, 28 Mar 2025 10:06:43 +0000 (18:06 +0800)]
docs/zh_CN: Add how-to of Chinese translation
Many new faces keep appearing on the mailing list from time to
time, and there may be many potential developers who want to
participate in the Chinese translation but don't know how to
get started. As more and more documents are translated, it is
becoming increasingly important to improve the maintainability
of Chinese documents. We have a lot of conventions, but currently
these conventions are still being passed on orally. At the same
time, during the review process, especially for the first few
patches submitted by newbies, we have made too many repetitive
comments. In order to address the above issues, I have drafted
this guide, and there is still a lot that needs to be improved.
Wang Yaxin [Wed, 19 Mar 2025 07:52:37 +0000 (15:52 +0800)]
Docs/zh_CN: Translate msg_zerocopy.rst to Simplified Chinese
translate the "msg_zerocopy.rst" into Simplified Chinese.
Update to commit bac2cac12c26("docs: net: description of
MSG_ZEROCOPY for AF_VSOCK")
Fix embedded code type issue by Alex Shi.
Signed-off-by: Wang Yaxin <wang.yaxin@zte.com.cn> Signed-off-by: Jiang Kun <jiang.kun2@zte.com.cn> Signed-off-by: xu xin <xu.xin16@zte.com.cn> Signed-off-by: He Peilin <he.peilin@zte.com.cn> Reviewed-by: Yanteng Si <si.yanteng@linux.dev> Link: https://lore.kernel.org/r/20250319155237978a-_o_XXMLszvXPDlyRsb4@zte.com.cn Signed-off-by: Alex Shi <alexs@kernel.org>
Wang Yaxin [Wed, 19 Mar 2025 07:51:10 +0000 (15:51 +0800)]
Docs/zh_CN: Translate index.rst to Simplified Chinese
translate the "index.rst" into Simplified Chinese.
Update to commit e793b86ae44e("Documentation: networking: add
Twisted Pair Ethernet diagnostics at OSI Layer 1")
Signed-off-by: Wang Yaxin <wang.yaxin@zte.com.cn> Signed-off-by: Jiang Kun <jiang.kun2@zte.com.cn> Signed-off-by: xu xin <xu.xin16@zte.com.cn> Signed-off-by: He Peilin <he.peilin@zte.com.cn> Link: https://lore.kernel.org/r/20250319155110884FL0FcZmsjNzP1NnAC70Zs@zte.com.cn Signed-off-by: Alex Shi <alexs@kernel.org>
Jonathan Corbet [Wed, 9 Apr 2025 18:24:51 +0000 (12:24 -0600)]
Merge branch 'mauro' into docs-mw
Mauro says:
This changeset contains the kernel-doc.py script to replace the verable
kernel-doc originally written in Perl. It replaces the first version and the
second series I sent on the top of it.
I tried to stay as close as possible of the original Perl implementation
on the first patch introducing kernel-doc.py, as it helps to double check
if each function was properly translated to Python. This have been
helpful debugging troubles that happened during the conversion.
I worked hard to make it bug-compatible with the original one. Still, its
output has a couple of differences from the original one:
- The tab expansion works better with the Python script. With that, some
outputs that contain tabs at kernel-doc markups are now different;
- The new script works better stripping blank lines. So, there are a couple
of empty new lines that are now stripped with this version;
- There is a buggy logic at kernel-doc to strip empty description and
return sections. I was not able to replicate the exact behavior. So, I ended
adding an extra logic to strip empty sections with a different algorithm.
Yet, on my tests, the results are compatible with the venerable script
output for all .. kernel-doc tags found in Documentation/. I double-checked
this by adding support to output the kernel-doc commands when V=1, and
then I ran a diff between kernel-doc.pl and kernel-doc.py for the same
command lines.
The only patch that doesn't belong to this series is a patch dropping
kernel-doc.pl. I opted to keep it for now, as it can help to better
test the new tools.
With such changes, if one wants to build docs with the old script,
all it is needed is to use KERNELDOC parameter, e.g.:
have a typedef_type that ends with a * and therefore has no word
boundary. Add an extra clause for the final group of the typedef_type so
we only require a word boundary if we match a word.
[mchehab: modify also kernel-doc.py, as we're deprecating the perl version]
Change the logic which detects internal/external symbols in a way
that we can re-use it when calling via Sphinx extension.
While here, remove an unused self.config var and let it clearer
that self.config variables are read-only. This helps to allow
handling multiple times in parallel if ever needed.
scripts/lib/kdoc/kdoc_files.py: allow filtering output per fname
For kerneldoc Sphinx extension, it is useful to display
parsed results only from a single file. Change the logic at
KernelFiles.msg() to allow such usage.
scripts/lib/kdoc/kdoc_parser.py: remove a python 3.9 dependency
str.removesuffix() was added on Python 3.9, but rstrip()
actually does the same thing, as we just want to remove a single
character. It is also shorter.
This is not handled well, as the "\" strings will be just stored inside
Sphinx options.
While the actual problem deserves being fixed, better to relax the
keneldoc.py extension to silently strip "\" from the end of strings,
as otherwise this may cause troubles when preparing arguments to
be executed by kernel-doc.
docs: sphinx: kerneldoc: verbose kernel-doc command if V=1
It is useful to know what kernel-doc command was used during
document build time, as it allows one to check the output the same
way as Sphinx extension does.
docs: add a .pylintrc file with sys path for docs scripts
The docs scripts that are used by Documentation/sphinx are
using scripts/lib/* directories to place classes that will
be used by both extensions and scripts.
When pylint is used, it needs to identify the path where
such scripts are, otherwise it will bail out. Add a simple
RC file placing the location of such files.
scripts/kernel-doc.py: postpone warnings to the output plugin
We don't want to have warnings displayed for symbols that
weren't output. So, postpone warnings print to the output
plugin, where symbol output is validated.
scripts/kernel-doc.py: fix handling of doc output check
The filtering logic was seeking for the DOC name to check for
symbols, but such data is stored only inside a section. Add it
to the output_declaration, as it is quicker/easier to check
the declaration name than to check inside each section.
While here, make sure that the output for both ReST and man
after filtering will be similar to what kernel-doc Perl
version does.
scripts/kernel-doc.py: implement support for -no-doc-sections
The venerable kernel-doc Perl script has a number of options that
aren't properly documented. Among them, there is -no-doc-sections,
which is used by the Sphinx extension.
scripts/kernel-doc.py: move file lists to the parser function
Instead of setting file lists at __init__ time, move it to
the actual parsing function. This allows adding more files
to be parsed in real time, by calling parse function multiple
times.
With the new way, the export_files logic was rewritten to
avoid parsing twice EXPORT_SYMBOL for partial matches.
Please notice that, with this logic, it can still read the
same file twice when export_file is used.
scripts/kernel-doc.py: convert message output to an interactor
Instead of directly printing output messages, change kdoc classes
to return an interactor with the output message, letting the
actual display to happen at the command-line command.
Handing nested parenthesis with regular expressions is not an
easy task. It is even harder with Python's re module, as it
has a limited subset of regular expressions, missing more
advanced features.
We might use instead Python regex module, but still the
regular expressions are very hard to understand. So, instead,
add a logic to properly match delimiters.
While doing the conversion, we opted to skip empty sections
(description, return), but this makes harder to see the differences
between kernel-doc (Perl) and kernel-doc.py.
Also, the logic doesn't always work properly. So, change the
way this is done by adding an extra step to remove such
sections, doing it only for Return and Description.
Maintaining kernel-doc has been a challenge, as there aren't many
perl developers among maintainers. Also, the logic there is too
complex. Having lots of global variables and using pure functions
doesn't help.
Rewrite the script in Python, placing most global variables
inside classes. This should help maintaining the script in long
term.
It also allows a better integration with kernel-doc Sphinx
extension in the future.
I opted to keep this version as close as possible to what we
have already in Perl. There are some differences though:
1. There is one regular expression that required a rewrite:
Rewrite it to use a much simpler regular expression:
/\bSTRUCT_GROUP\(([^\)]+)\)[^;]*;/
Extra care should be taken when validating this script, as such
replacement might cause some regressions.
2. The filters are now applied only during output generation.
In particular, "nosymbol" argument is only handled there.
It means that, if the same file is processed twice for
different symbols, the warnings will be duplicated.
I opted to use this behavior as it allows the Sphinx extension
to read the file(s) only once, and apply the filtering only
when producing the ReST output. This hopefully will help
to speed up doc generation
3. This version can handle multiple files and multiple directories.
So, if one just wants to produce a big output with everything
inside a file, this could be done with
$ time ./scripts/kernel-doc.py -man . 2>/dev/null >new
real 0m54.592s
user 0m53.345s
sys 0m0.997s
4. I tried to replicate as much as possible the same arguments
from kernel-doc, with about the same behavior, for the
command line parameters starting with a single dash (-parameter).
I also added one letter aliases for each parameter, and a
--parameter (sometimes with a better name).
5. There are some sutile nuances between how Perl handles
certain regular expressions. In special, the qr operatior,
which compiles a regular expression also works as a
non-capturing group. It means that some regexes like
this one:
tools/include: make uapi/linux/types.h usable from assembly
The "real" linux/types.h UAPI header gracefully degrades to a NOOP when
included from assembly code.
Mirror this behaviour in the tools/ variant.
Test for __ASSEMBLER__ over __ASSEMBLY__ as the former is provided by the
toolchain automatically.
Reported-by: Mark Brown <broonie@kernel.org> Closes: https://lore.kernel.org/lkml/af553c62-ca2f-4956-932c-dd6e3a126f58@sirena.org.uk/ Fixes: c9fbaa879508 ("selftests: vDSO: parse_vdso: Use UAPI headers instead of libc headers") Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Link: https://patch.msgid.link/20250321-uapi-consistency-v1-1-439070118dc0@linutronix.de Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Merge tag 'soundwire-6.15-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire
Pull soundwire fix from Vinod Koul:
- add missing config symbol CONFIG_SND_HDA_EXT_CORE required for asoc
driver CONFIG_SND_SOF_SOF_HDA_SDW_BPT
* tag 'soundwire-6.15-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
ASoC: SOF: Intel: Let SND_SOF_SOF_HDA_SDW_BPT select SND_HDA_EXT_CORE
Len Brown [Sun, 6 Apr 2025 18:49:20 +0000 (14:49 -0400)]
tools/power turbostat: v2025.05.06
Support up to 8192 processors
Add cpuidle governor debug telemetry, disabled by default
Update default output to exclude cpuidle invocation counts
Bug fixes
Merge tag 'perf-urgent-2025-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf event fix from Ingo Molnar:
"Fix a perf events time accounting bug"
* tag 'perf-urgent-2025-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Fix child_total_time_enabled accounting bug at task exit
Merge tag 'sched-urgent-2025-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
- Fix a nonsensical Kconfig combination
- Remove an unnecessary rseq-notification
* tag 'sched-urgent-2025-04-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
rseq: Eliminate useless task_work on execve
sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP
... and don't error out so hard on missing module descriptions.
Before commit 6c6c1fc09de3 ("modpost: require a MODULE_DESCRIPTION()")
we used to warn about missing module descriptions, but only when
building with extra warnigns (ie 'W=1').
After that commit the warning became an unconditional hard error.
And it turns out not all modules have been converted despite the claims
to the contrary. As reported by Damian Tometzki, the slub KUnit test
didn't have a module description, and apparently nobody ever really
noticed.
The reason nobody noticed seems to be that the slub KUnit tests get
disabled by SLUB_TINY, which also ends up disabling a lot of other code,
both in tests and in slub itself. And so anybody doing full build tests
didn't actually see this failre.
So let's disable SLUB_TINY for build-only tests, since it clearly ends
up limiting build coverage. Also turn the missing module descriptions
error back into a warning, but let's keep it around for non-'W=1'
builds.
Len Brown [Sun, 6 Apr 2025 15:18:39 +0000 (11:18 -0400)]
tools/power turbostat: report CoreThr per measurement interval
The CoreThr column displays total thermal throttling events
since boot time.
Change it to report events during the measurement interval.
This is more useful for showing a user the current conditions.
Total events since boot time are still available to the user via
/sys/devices/system/cpu/cpu*/thermal_throttle/*
Document CoreThr on turbostat.8
Fixes: eae97e053fe30 ("turbostat: Support thermal throttle count print") Reported-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Cc: Chen Yu <yu.c.chen@intel.com>
Justin Ernst [Wed, 19 Mar 2025 20:27:31 +0000 (15:27 -0500)]
tools/power turbostat: Increase CPU_SUBSET_MAXCPUS to 8192
On systems with >= 1024 cpus (in my case 1152), turbostat fails with the error output:
"turbostat: /sys/fs/cgroup/cpuset.cpus.effective: cpu str malformat 0-1151"
A similar error appears with the use of turbostat --cpu when the inputted cpu
range contains a cpu number >= 1024:
# turbostat -c 1100-1151
"--cpu 1100-1151" malformed
...
Both errors are caused by parse_cpu_str() reaching its limit of CPU_SUBSET_MAXCPUS.
It's a good idea to limit the maximum cpu number being parsed, but 1024 is too low.
For a small increase in compute and allocated memory, increasing CPU_SUBSET_MAXCPUS
brings support for parsing cpu numbers >= 1024.
Increase CPU_SUBSET_MAXCPUS to 8192, a common setting for CONFIG_NR_CPUS on x86_64.
Signed-off-by: Justin Ernst <justin.ernst@hpe.com> Signed-off-by: Len Brown <len.brown@intel.com>
projects / thirdparty / kernel / linux.git / log
