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The linux-next integration testing tree
92a8b224b8
Patch series "Enhance min heap API with non-inline functions and optimizations", v2. Add non-inline versions of the min heap API functions in lib/min_heap.c and updates all users outside of kernel/events/core.c to use these non-inline versions. To mitigate the performance impact of indirect function calls caused by the non-inline versions of the swap and compare functions, a builtin swap has been introduced that swaps elements based on their size. Additionally, it micro-optimizes the efficiency of the min heap by pre-scaling the counter, following the same approach as in lib/sort.c. Documentation for the min heap API has also been added to the core-api section. This patch (of 10): All current min heap API functions are marked with '__always_inline'. However, as the number of users increases, inlining these functions everywhere leads to a increase in kernel size. In performance-critical paths, such as when perf events are enabled and min heap functions are called on every context switch, it is important to retain the inline versions for optimal performance. To balance this, the original inline functions are kept, and additional non-inline versions of the functions have been added in lib/min_heap.c. Link: https://lkml.kernel.org/r/20241020040200.939973-1-visitorckw@gmail.com Link: https://lore.kernel.org/20240522161048.8d8bbc7b153b4ecd92c50666@linux-foundation.org Link: https://lkml.kernel.org/r/20241020040200.939973-2-visitorckw@gmail.com Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Ching-Chun (Jim) Huang <jserv@ccns.ncku.edu.tw> Cc: Coly Li <colyli@suse.de> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Kuan-Wei Chiu <visitorckw@gmail.com> Cc: "Liang, Kan" <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matthew Sakai <msakai@redhat.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| kernel | ||
| lib | ||
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| samples | ||
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| tools | ||
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| .editorconfig | ||
| .get_maintainer.ignore | ||
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| .gitignore | ||
| .mailmap | ||
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| COPYING | ||
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| README | ||
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.