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dc140045c0
We use defer cache flush mechanism to improve the performance of 610, but the implementation is wrong. We fix it up now and update the mechanism: - Zero page needn't be flushed. - If page is file mapping & non-touched in user space, defer flush. - If page is anon mapping or dirty file mapping, flush immediately. - In update_mmu_cache finish the defer flush by flush_dcache_page(). For 610 we need take care the dcache aliasing issue: - VIPT cache with 8K-bytes size per way in 4K page granularity. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Cc: Arnd Bergmann <arnd@arndb.de>
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.