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Michal Koutný d6809c2f60 sched: Do not construct nor expose RT_GROUP_SCHED structures if disabled
Thanks to kernel cmdline being available early, before any
cgroup hierarchy exists, we can achieve the RT_GROUP_SCHED boottime
disabling goal by simply skipping any creation (and destruction) of
RT_GROUP data and its exposure via RT attributes.

We can do this thanks to previously placed runtime guards that would
redirect all operations to root_task_group's data when RT_GROUP_SCHED
disabled.

Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20250310170442.504716-8-mkoutny@suse.com
2025-04-08 20:55:54 +02:00
Documentation sched: Add commadline option for RT_GROUP_SCHED toggling 2025-04-08 20:55:53 +02:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
arch cxl for v6.15 2025-04-02 20:04:43 -07:00
block for-6.15/block-20250322 2025-03-26 18:08:55 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto This push fixes reverts the multibuffer hash testing as it is buggy. 2025-04-02 09:14:59 -07:00
drivers firewire updates for v6.15 2025-04-02 22:41:04 -07:00
fs NFS client updates for Linux 6.15 2025-04-02 17:06:31 -07:00
include sched/tracepoints: Move and extend the sched_process_exit() tracepoint 2025-04-04 10:30:19 +02:00
init sched: Add commadline option for RT_GROUP_SCHED toggling 2025-04-08 20:55:53 +02:00
io_uring for-6.15/io_uring-reg-vec-20250327 2025-03-28 15:07:04 -07:00
ipc treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
kernel sched: Do not construct nor expose RT_GROUP_SCHED structures if disabled 2025-04-08 20:55:54 +02:00
lib more printk changes for 6.15 2025-04-02 10:05:55 -07:00
mm mm/page_alloc: Fix try_alloc_pages 2025-04-02 09:34:31 -07:00
net NFS client updates for Linux 6.15 2025-04-02 17:06:31 -07:00
rust LoongArch changes for v6.15 2025-04-02 12:15:01 -07:00
samples Char/Misc/IIO driver updates for 6.15-rc1 2025-04-01 11:26:08 -07:00
scripts These are objtool fixes and updates by Josh Poimboeuf, centered 2025-04-02 10:30:10 -07:00
security Driver core updates for 6.15-rc1 2025-04-01 11:02:03 -07:00
sound These are objtool fixes and updates by Josh Poimboeuf, centered 2025-04-02 10:30:10 -07:00
tools cxl for v6.15 2025-04-02 20:04:43 -07:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-05 04:06:45 +09:00
virt ARM: 2025-03-25 14:22:07 -07:00
.clang-format clang-format: Update with v6.11-rc1's `for_each` macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-01-10 00:17:25 +01:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: Retire Ralf Baechle 2024-11-12 15:48:59 +01:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: use host dylib naming convention to support macOS 2025-01-10 01:01:24 +01:00
.mailmap - The 7 patch series "powerpc/crash: use generic crashkernel 2025-04-01 10:06:52 -07:00
.rustfmt.toml rust: add `.rustfmt.toml` 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS vfs-6.15-rc1.fixes 2025-04-02 16:05:21 -07:00
Kbuild drm: ensure drm headers are self-contained and pass kernel-doc 2025-02-12 10:44:43 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS USB/Thunderbolt update for 6.15-rc1 2025-04-02 18:23:31 -07:00
Makefile [ Merge note: this pull request depends on you having merged 2025-03-24 22:06:11 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.