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In multi-host (MH) NIC scheme, a single HW port serves multiple hosts or sockets on the same host. The HW uses a mechanism in the PCIe buffer which monitors the amount of consumed PCIe buffers per host. On a certain configuration, under congestion, the HW emulates a switch doing ECN marking on packets using ECN indication on the completion descriptor (CQE). The driver needs to set the ECN bits on the packet SKB, such that the network stack can react on that, this commit does that. Signed-off-by: Natali Shechtman <natali@mellanox.com> Reviewed-by: Tariq Toukan <tariqt@mellanox.com> Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.