mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-01-06 17:15:35 -05:00
a8d5dd192a
mlx5-updates-2020-12-01 mlx5e port TX timestamping support and MISC updates 1) Add support for port TX timestamping, for better PTP accuracy. Currently in mlx5 HW TX timestamping is done on CQE (TX completion) generation, which much earlier than when the packet actually goes out to the wire, in this series Eran implements the option to do timestamping on the port using a special SQ (Send Queue), such Send Queue will generate 2 CQEs (TX completions), the original one and a new one when the packet leaves the port, due to the nature of this special handling, such mechanism is an opt-in only and it is off by default to avoid any performance degradation on normal traffic flows. This patchset improves TX Hardware timestamping offset to be less than 40ns at a 100Gbps line rate, compared to 600ns before. With that, making our HW compliant with G.8273.2 class C, and allow Linux systems to be deployed in the 5G telco edge, where this standard is a must. 2) Misc updates and trivial improvements. 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.