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Edward Cree a64499f618 net: ethtool: account for RSS+RXNFC add semantics when checking channel count
In ethtool_check_max_channel(), the new RX count must not only cover the
 max queue indices in RSS indirection tables and RXNFC destinations
 separately, but must also, for RXNFC rules with FLOW_RSS, cover the sum
 of the destination queue and the maximum index in the associated RSS
 context's indirection table, since that is the highest queue that the
 rule can actually deliver traffic to.
It could be argued that the max queue across all custom RSS contexts
 (ethtool_get_max_rss_ctx_channel()) need no longer be considered, since
 any context to which packets can actually be delivered will be targeted
 by some RXNFC rule and its max will thus be allowed for by
 ethtool_get_max_rxnfc_channel().  For simplicity we keep both checks, so
 even RSS contexts unused by any RXNFC rule must fit the channel count.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://patch.msgid.link/43257d375434bef388e36181492aa4c458b88336.1731499022.git.ecree.xilinx@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
History 2024-11-14 19:53:42 -08:00
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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 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.