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The recommendation for headroom size for 100Gbps port and 100m cable is 101.6KB, reduced accordingly for split ports. The closest higher number evenly divisible by cell size for both Spectrum-1 and Spectrum-2, and such that the number of cells can be further divided by maximum split factor of 4, is 102528 bytes, or 25632 bytes per lane. Update mlxsw_sp_port_pb_init() to compute the headroom taking into account this recommended per-lane value and number of lanes actually dedicated to a given port. Signed-off-by: Petr Machata <petrm@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.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 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.