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e19cd0b6fa
When enable a cgroup event, cpuctx->cgrp setting is conditional on the current task cgrp matching the event's cgroup, so have to do it for every new event. It brings complexity but no advantage. To keep it simple, this patch would always set cpuctx->cgrp when enable the first cgroup event, and reset to NULL when disable the last cgroup event. Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20220329154523.86438-5-zhouchengming@bytedance.com
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.