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7e9f7d17fe
When comparing the current struct sched_group with the yet-busiest domain in update_sd_pick_busiest(), if the two groups have the same group type, we're currently doing a bit of unnecessary work for any group >= group_misfit_task. We're comparing the two groups, and then returning only if false (the group in question is not the busiest). Otherwise, we break out, do an extra unnecessary conditional check that's vacuously false for any group type > group_fully_busy, and then always return true. Let's just return directly in the switch statement instead. This doesn't change the size of vmlinux with llvm 17 (not surprising given that all of this is inlined in load_balance()), but it does shrink load_balance() by 88 bytes on x86. Given that it also improves readability, this seems worth doing. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org> Reviewed-by: Valentin Schneider <vschneid@redhat.com> Link: https://lore.kernel.org/r/20240206043921.850302-4-void@manifault.com |
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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 Restructured Text 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.