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Linux kernel source tree
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QoS request for CPU_DMA_LATENCY can be better optimized if the request can be set only for the required cpus and not all cpus. This helps save power on other cores, while still gauranteeing the quality of service. Enhance the QoS constraints data structures to support target value for each core. Requests specify if the QoS is applicable to all cores (default) or to a selective subset of the cores or to a core(s), that the IRQ is affine to. QoS requests that need to track an IRQ can be set to apply only on the cpus to which the IRQ's smp_affinity attribute is set to. The QoS framework will automatically track IRQ migration between the cores. The QoS is updated to be applied only to the core(s) that the IRQ has been migrated to. Idle and interested drivers can request a PM QoS value for a constraint across all cpus, or a specific cpu or a set of cpus. Separate APIs have been added to request for individual cpu or a cpumask. The default behaviour of PM QoS is maintained i.e, requests that do not specify a type of the request will continue to be effected on all cores. Requests that want to specify an affinity of cpu(s) or an irq, can modify the PM QoS request data structures by specifying the type of the request and either the mask of the cpus or the IRQ number depending on the type. Updating the request does not reset the type of the request. The userspace sysfs interface does not support CPU/IRQ affinity. Signed-off-by: Lina Iyer <ilina@codeaurora.org> (cherry picked from commit 16cafdb44fb3a66a7d06936d775efe483ad62b7d) Bug: 153463922 Test: build Signed-off-by: Suren Baghdasaryan <surenb@google.com> Change-Id: I1aad836a985fd303f2254fe607bb909a6b720dd5 |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| abi_gki_aarch64_cuttlefish_whitelist | ||
| abi_gki_aarch64_qcom_whitelist | ||
| abi_gki_aarch64_whitelist | ||
| abi_gki_aarch64.xml | ||
| 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-debug.aarch64 | ||
| build.config.gki-debug.x86_64 | ||
| build.config.gki.aarch64 | ||
| build.config.gki.x86_64 | ||
| build.config.x86_64 | ||
| 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 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.