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Vladimir Oltean says: ==================== Add kernel tc-mqprio and tc-taprio support for preemptible traffic classes The last RFC in August 2022 contained a proposal for the UAPI of both TSN standards which together form Frame Preemption (802.1Q and 802.3): https://lore.kernel.org/netdev/20220816222920.1952936-1-vladimir.oltean@nxp.com/ It wasn't clear at the time whether the 802.1Q portion of Frame Preemption should be exposed via the tc qdisc (mqprio, taprio) or via some other layer (perhaps also ethtool like the 802.3 portion, or dcbnl), even though the options were discussed extensively, with pros and cons: https://lore.kernel.org/netdev/20220816222920.1952936-3-vladimir.oltean@nxp.com/ So the 802.3 portion got submitted separately and finally was accepted: https://lore.kernel.org/netdev/20230119122705.73054-1-vladimir.oltean@nxp.com/ leaving the only remaining question: how do we expose the 802.1Q bits? This series proposes that we use the Qdisc layer, through separate (albeit very similar) UAPI in mqprio and taprio, and that both these Qdiscs pass the information down to the offloading device driver through the common mqprio offload structure (which taprio also passes). An implementation is provided for the NXP LS1028A on-board Ethernet endpoint (enetc). Previous versions also contained support for its embedded switch (felix), but this needs more work and will be submitted separately. v4: https://lore.kernel.org/netdev/20230403103440.2895683-1-vladimir.oltean@nxp.com/ v2: https://lore.kernel.org/netdev/20230219135309.594188-1-vladimir.oltean@nxp.com/ v1: https://lore.kernel.org/netdev/20230216232126.3402975-1-vladimir.oltean@nxp.com/ ==================== Link: https://lore.kernel.org/r/20230411180157.1850527-1-vladimir.oltean@nxp.com Signed-off-by: Jakub Kicinski <kuba@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.