fdab3bbf27
The RT_RUNTIME_SHARE sched feature enables the sharing of rt_runtime between CPUs, allowing a CPU to run a real-time task up to 100% of the time while leaving more space for non-real-time tasks to run on the CPU that lend rt_runtime. The problem is that a CPU can easily borrow enough rt_runtime to allow a spinning rt-task to run forever, starving per-cpu tasks like kworkers, which are non-real-time by design. This patch disables RT_RUNTIME_SHARE by default, avoiding this problem. The feature will still be present for users that want to enable it, though. Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Wei Wang <wvw@google.com> Link: https://lkml.kernel.org/r/b776ab46817e3db5d8ef79175fa0d71073c051c7.1600697903.git.bristot@redhat.com (cherry picked from commit 2586af1ac187f6b3a50930a4e33497074e81762d) Change-Id: Ibb1b185d512130783ac9f0a29f0e20e9828c86fd Bug: 169673278 Test: build, boot and check the trace with RT task Signed-off-by: Kyle Lin <kylelin@google.com> Change-Id: Iffede8107863b02ad4a0cb902fc8119416931bdb |
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android | ||
arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
techpack | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.gitmodules | ||
.mailmap | ||
AndroidKernel.mk | ||
build.config.aarch64 | ||
build.config.allmodconfig | ||
build.config.allmodconfig.aarch64 | ||
build.config.allmodconfig.arm | ||
build.config.allmodconfig.x86_64 | ||
build.config.arm | ||
build.config.common | ||
build.config.gki | ||
build.config.gki_kasan | ||
build.config.gki_kasan.aarch64 | ||
build.config.gki_kasan.x86_64 | ||
build.config.gki_kprobes | ||
build.config.gki_kprobes.aarch64 | ||
build.config.gki_kprobes.x86_64 | ||
build.config.gki-debug.aarch64 | ||
build.config.gki-debug.x86_64 | ||
build.config.gki.aarch64 | ||
build.config.gki.x86_64 | ||
build.config.goldfish.arm | ||
build.config.goldfish.arm64 | ||
build.config.goldfish.mips | ||
build.config.goldfish.mips64 | ||
build.config.goldfish.x86 | ||
build.config.goldfish.x86_64 | ||
build.config.x86_64 | ||
COPYING | ||
CREDITS | ||
gen_headers_arm64.bp | ||
gen_headers_arm.bp | ||
Kbuild | ||
Kconfig | ||
kernel_headers.py | ||
MAINTAINERS | ||
Makefile | ||
OWNERS | ||
README | ||
verity_dev_keys.x509 |
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. See Documentation/00-INDEX for a list of what is contained in each file. 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.