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1d00c33d8b
Use the upstream slow path to find an idle cpu for prefer-idle tasks. This slow-path is actually faster than the EAS path we are currently going through (compute_energy()) which is really slow. No performance degradation is seen with this and it reduces the delta quite a bit between upstream and out of tree code. It's not clear yet if using the mainline slow path task placement when a task has the schedtune attribute prefer_idle=1 is the right thing to do for products. Put the option to disable this behind a sched feature so we can try out both options. Signed-off-by: Joel Fernandes <joelaf@google.com> (refactored for 4.14 version) Signed-off-by: Chris Redpath <chris.redpath@arm.com> (cherry picked from commit c0ff131c88f68e4985793663144b6f9cf77be9d3) [ - Refactored for 4.17 version - Adjusted the commit header to the new function names ] Signed-off-by: Quentin Perret <quentin.perret@arm.com> Change-Id: Icf762a101c92c0e3f9e61df0370247fa15455581
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.