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Gustavo Luiz Duarte says: ==================== netconsole: Add support for msgid in sysdata This patch series introduces a new feature to netconsole which allows appending a message ID to the userdata dictionary. If the msgid feature is enabled, the message ID is built from a per-target 32 bit counter that is incremented and appended to every message sent to the target. Example:: echo 1 > "/sys/kernel/config/netconsole/cmdline0/userdata/msgid_enabled" echo "This is message #1" > /dev/kmsg echo "This is message #2" > /dev/kmsg 13,434,54928466,-;This is message #1 msgid=1 13,435,54934019,-;This is message #2 msgid=2 This feature can be used by the target to detect if messages were dropped or reordered before reaching the target. This allows system administrators to assess the reliability of their netconsole pipeline and detect loss of messages due to network contention or temporary unavailability. --- Changes in v3: - Add kdoc documentation for msgcounter. - Link to v2: https://lore.kernel.org/r/20250612-netconsole-msgid-v2-0-d4c1abc84bac@gmail.com Changes in v2: - Use wrapping_assign_add() to avoid warnings in UBSAN and friends. - Improve documentation to clarify wrapping and distinguish msgid from sequnum. - Rebase and fix conflict in prepare_extradata(). - Link to v1: https://lore.kernel.org/r/20250611-netconsole-msgid-v1-0-1784a51feb1e@gmail.com ==================== Suggested-by: Breno Leitao <leitao@debian.org> Signed-off-by: Gustavo Luiz Duarte <gustavold@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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 reStructuredText 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.