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.
David S. Miller
authored
Ido Schimmel says: ==================== mlxsw: spectrum_acl: Include delta bits into hashtable key The Spectrum-2 ASIC allows multiple rules to use the same mask provided that the difference between their masks is small enough (up to 8 consecutive delta bits). A more detailed explanation is provided in merge commit 756cd366 ("Merge branch 'mlxsw-Introduce-algorithmic-TCAM-support'"). These delta bits are part of the rule's key and therefore rules that only differ in their delta bits can be inserted with the same A-TCAM mask. In case two rules share the same key and only differ in their priority, then the second will spill to the C-TCAM. Current code does not take the delta bits into account when checking for duplicate rules, which leads to unnecessary spillage to the C-TCAM. This may result in reduced scale and performance. Patch #1 includes the delta bits in the rule's key to avoid the above mentioned problem. Patch #2 adds a tracepoint when a rule is inserted into the C-TCAM. Patches #3-#5 add test cases to make sure unnecessary spillage into the C-TCAM does not occur. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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