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According to ANDROID commit a9567a35d0 ("ANDROID: arm64: Disable workaround
for CPU errata 2441007 and 2441009"):
CPU errata 2441007 (Cortex-A55) and 2441009 (Cortex-A510) are categorised
as "rare" by Arm and consequently the workaround is not intended to be
deployed in practice as the issue is not expected to occur in real-world
environments.
Given that the cost of the workaround, which issues additional broadcast
TLB invalidation requests, has been shown to impact kswapd significantly
on Pixel devices, disable the workaround following Arm's recommendation.
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
Change-Id: I794d048a094714c1370752bfaa47bee2afd57d53
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.