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93bc2e9e94
musl nftw implementation does not support FTW_ACTIONRETVAL. There have been multiple attempts at pushing the feature in musl upstream, but it has been refused or ignored all the times: https://www.openwall.com/lists/musl/2021/03/26/1 https://www.openwall.com/lists/musl/2022/01/22/1 In this case we only care about /proc/<pid>/fd/<fd>, so it's not too difficult to reimplement directly instead, and the new implementation makes 'bpftool perf' slightly faster because it doesn't needlessly stat/readdir unneeded directories (54ms -> 13ms on my machine). Signed-off-by: Dominique Martinet <asmadeus@codewreck.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Quentin Monnet <quentin@isovalent.com> Link: https://lore.kernel.org/bpf/20220424051022.2619648-4-asmadeus@codewreck.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.