61c64a25ae
With the new page-table layout, using full (4k) pages for (256 byte) pte-tables is immensely wastefull. Move the pte-tables over to the same allocator already used for the (512 byte) higher level tables (pgd/pmd). This reduces the pte-table waste from 15x to 2x. Due to no longer being bound to 16 consecutive tables, this might actually already be more efficient than the old code for sparse tables. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Will Deacon <will@kernel.org> Acked-by: Greg Ungerer <gerg@linux-m68k.org> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Tested-by: Greg Ungerer <gerg@linux-m68k.org> Link: https://lore.kernel.org/r/20200131125403.825295149@infradead.org Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
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.