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Ethernet frame consists of - Ethernet header, payload, FCS. The MTU value which is used by user is the size of the payload, which means that when user sets MTU to X, the total frame size will be larger due to the addition of the Ethernet header and FCS. Spectrum ASICs take into account Ethernet header and FCS as part of packet size for MTU check. Adjust MTU value when user sets MTU, to configure the MTU size which is required by hardware. The Tx header length which was used by the driver is not relevant for such calculation, take into account Ethernet header (with VLAN extension) and FCS. Signed-off-by: Amit Cohen <amcohen@nvidia.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Petr Machata <petrm@nvidia.com> Link: https://lore.kernel.org/r/f3203c2477bb8ed18b1e79642fa3e3713e1e55bb.1718275854.git.petrm@nvidia.com Signed-off-by: Jakub Kicinski <kuba@kernel.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 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.