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This enables module_alloc() to allocate huge page for 2MB+ requests. To check the difference of this change, we need enable config CONFIG_PTDUMP_DEBUGFS, and call module_alloc(2MB). Before the change, /sys/kernel/debug/page_tables/kernel shows pte for this map. With the change, /sys/kernel/debug/page_tables/ show pmd for thie map. Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20220204185742.271030-2-song@kernel.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.