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Ido Schimmel says: ==================== mlxsw: Update main pool computation and pool size limits Petr says: In Spectrum ASICs, the shared buffer is an area of memory where packets are kept until they can be transmitted. There are two resources associated with shared buffer size: cap_total_buffer_size and cap_guaranteed_shared_buffer. So far, mlxsw has been using the former as a limit when validating shared buffer pool size configuration. However, the total size also includes headrooms and reserved space, which really cannot be used for shared buffer pools. Patch #1 mends this and has mlxsw use the guaranteed size. To configure default pool sizes, mlxsw has historically hard-coded one or two smallish pools, and one "main" pool that took most of the shared buffer (that would be pool 0 on ingress and pool 4 on egress). During the development of Spectrum-2, it became clear that the shared buffer size keeps shrinking as bugs are identified and worked around. In order to prevent having to tweak the size of pools 0 and 4 to catch up with updates to values reported by the FW, patch #2 changes the way these pools are set. Instead of hard-coding a fixed value, the main pool now takes whatever is left from the guaranteed size after the smaller pool(s) are taken into account. ==================== 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.