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JP Kobryn says: ==================== Due to the way the datasec maps like bss, data, rodata are memory mapped, they cannot be resized with bpf_map__set_value_size() like non-datasec maps can. This series offers a way to allow the resizing of datasec maps, by having the mapped regions resized as needed and also adjusting associated BTF info if possible. The thought behind this is to allow for use cases where a given datasec needs to scale to for example the number of CPU's present. A bpf program can have a global array in a data section with an initial length and before loading the bpf program, the array length could be extended to match the CPU count. The selftests included in this series perform this scaling to an arbitrary value to demonstrate how it can work. ==================== Signed-off-by: Andrii Nakryiko <andrii@kernel.org> |
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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.