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987ddbe487
For new Centaur CPUs the ucode will take care of the preservation of cache coherence between CPU cores in C-states regardless of how deep the C-states are. So, it is not necessary to flush the caches in software befor entering C3. This useless operation will cause performance drop for the cores which share some caches with the idling core. Signed-off-by: David Wang <davidwang@zhaoxin.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Pavel Machek <pavel@ucw.cz> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: brucechang@via-alliance.com Cc: cooperyan@zhaoxin.com Cc: len.brown@intel.com Cc: linux-pm@kernel.org Cc: qiyuanwang@zhaoxin.com Cc: rjw@rjwysocki.net Cc: timguo@zhaoxin.com Link: http://lkml.kernel.org/r/1545900110-2757-1-git-send-email-davidwang@zhaoxin.com [ Tidy up the comment. ] Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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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.