12e6d7e641
Ioana Ciornei says: ==================== net: enetc: add support for software TSO This series adds support for driver level TSO in the enetc driver. Ever since the ENETC MDIO erratum workaround is in place, the Tx path is incurring a penalty (enetc_lock_mdio/enetc_unlock_mdio) for each skb to be sent out. On top of this, ENETC does not support Tx checksum offloading. This means that software TSO would help performance just by the fact that one single mdio lock/unlock sequence would cover multiple packets sent. On the other hand, checksum needs to be computed in software since the controller cannot handle it. This is why, beside using the usual tso_build_hdr()/tso_build_data() this specific implementation also has to compute the checksum, both IP and L4, for each resulted segment. Even with that, the performance improvement of a TCP flow running on a single A72@1.3GHz of the LS1028A SoC (2.5Gbit/s port) is the following: before: 1.63 Gbits/sec after: 2.34 Gbits/sec Changes in v2: - declare NETIF_F_HW_CSUM instead of NETIF_F_IP_CSUM in 1/2 - add support for TSO over IPv6 (NETIF_F_TSO6 and csum compute) in 2/2 ==================== 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.