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For more than a decade, CONFIG_SCHED_DEBUG=y has been enabled in all the major Linux distributions: /boot/config-6.11.0-19-generic:CONFIG_SCHED_DEBUG=y The reason is that while originally CONFIG_SCHED_DEBUG started out as a debugging feature, over the years (decades ...) it has grown various bits of statistics, instrumentation and control knobs that are useful for sysadmin and general software development purposes as well. But within the kernel we still pretend that there's a choice, and sometimes code that is seemingly 'debug only' creates overhead that should be optimized in reality. So make it all official and make CONFIG_SCHED_DEBUG unconditional. Now that all uses of CONFIG_SCHED_DEBUG are removed from the code by previous patches, remove the Kconfig option as well. Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Shrikanth Hegde <sshegde@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Vincent Guittot <vincent.guittot@linaro.org> Cc: Dietmar Eggemann <dietmar.eggemann@arm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ben Segall <bsegall@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Valentin Schneider <vschneid@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20250317104257.3496611-6-mingo@kernel.org
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.