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Ido Schimmel says: ==================== mlxsw: Derive SBIB from maximum port speed & MTU Petr says: Internal buffer is a part of port headroom used for packets that are mirrored due to triggers that the Spectrum ASIC considers "egress". Besides ACL mirroring on port egresss this includes also packets mirrored due to ECN marking. This patchset changes the way the internal mirroring buffer is reserved. Currently the buffer reflects port MTU and speed accurately. In the future, mlxsw should support dcbnl_setbuffer hook to allow the users to set buffer sizes by hand. In that case, there might not be enough space for growth of the internal mirroring buffer due to MTU and speed changes. While vetoing MTU changes would be merely confusing, port speed changes cannot be vetoed, and such change would simply lead to issues in packet mirroring. For these reasons, with these patches the internal mirroring buffer is derived from maximum MTU and maximum speed achievable on the port. Patches #1 and #2 introduce a new callback to determine the maximum speed a given port can achieve. With patches #3 and #4, the information about, respectively, maximum MTU and maximum port speed, is kept in struct mlxsw_sp_port. In patch #5, maximum MTU and maximum speed are used to determine the size of the internal buffer. MTU update and speed update hooks are dropped, because they are no longer necessary. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.