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Right now, guest current governors have the following ratings: * ladder -> 10 * teo -> 19 * menu -> 20 * haltpoll -> 21 * ladder + nohz=off -> 25 haltpoll governor got introduced and it is now the default governor given its highest rating -- with ladder+nohz being the exception -- regardless of idle driver in the guest. An example of an undesirable case is x86 KVM guests with MWAIT which have intel_idle registered first, and consequently will have haltpoll be used as governor which would get limited to a poll state and state 1 and the other states wouldn't get used. To keep the previous defaults we decrease rating of governor to 9 (below current lowest rating) and thus rely on @governor switch on cpuidle_register_driver() to tie in haltpoll idle driver and governor together. Signed-off-by: Joao Martins <joao.m.martins@oracle.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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| fs | ||
| include | ||
| init | ||
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| kernel | ||
| lib | ||
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| .clang-format | ||
| .cocciconfig | ||
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| 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.
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.