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Linux kernel source tree
a5bd6ba30b
SCX hooks into CPU cgroup controller operations and read-locks scx_cgroup_rwsem to exclude them while enabling and disable schedulers. While this works, it's unnecessarily complicated given that cgroup_[un]lock() are available and thus the cgroup operations can be locked out that way. Drop scx_cgroup_rwsem locking from the tg on/offline and cgroup [can_]attach operations. Instead, grab cgroup_lock() from scx_cgroup_lock(). Drop scx_cgroup_finish_attach() which is no longer necessary. Drop the now unnecessary rcu locking and css ref bumping in scx_cgroup_init() and scx_cgroup_exit(). As scx_cgroup_set_weight/bandwidth() paths aren't protected by cgroup_lock(), rename scx_cgroup_rwsem to scx_cgroup_ops_rwsem and retain the locking there. This is overall simpler and will also allow enable/disable paths to synchronize against cgroup changes independent of the CPU controller. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Acked-by: Andrea Righi <arighi@nvidia.com> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.