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160fb0d83f
ttwu_do_activate() is used for a complete wakeup, in which we will activate_task() and use ttwu_do_wakeup() to mark the task runnable and perform wakeup-preemption, also call class->task_woken() callback and update the rq->idle_stamp. Since ttwu_runnable() is not a complete wakeup, don't need all those done in ttwu_do_wakeup(), so we can move those to ttwu_do_activate() to simplify ttwu_do_wakeup(), making it only mark the task runnable to be reused in ttwu_runnable() and try_to_wake_up(). This patch should not have any functional changes. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20221223103257.4962-2-zhouchengming@bytedance.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.