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Michal Rostecki says: ==================== Feature probes in bpftool related to bpf_probe_write_user and bpf_trace_printk helpers emit dmesg warnings which might be confusing for people running bpftool on production environments. This patch series addresses that by filtering them out by default and introducing the new positional argument "full" which enables all available probes. The main motivation behind those changes is ability the fact that some probes (for example those related to "trace" or "write_user" helpers) emit dmesg messages which might be confusing for people who are running on production environments. For details see the Cilium issue[0]. v1 -> v2: - Do not expose regex filters to users, keep filtering logic internal, expose only the "full" option for including probes which emit dmesg warnings. v2 -> v3: - Do not use regex for filtering out probes, use function IDs directly. - Fix bash completion - in v2 only "prefix" was proposed after "macros", "dev" and "kernel" were not. - Rephrase the man page paragraph, highlight helper function names. - Remove tests which parse the plain output of bpftool (except the header/macros test), focus on testing JSON output instead. - Add test which compares the output with and without "full" option. v3 -> v4: - Use enum to check for helper functions. - Make selftests compatible with older versions of Python 3.x than 3.7. [0] https://github.com/cilium/cilium/issues/10048 ==================== Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> |
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| README | ||
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.