f7f732a719
Adding support for XDP multi-buffer entails adding information of all the fragments of the packet in the xdp_buff. This approach implies that underlying buffer has to provide tailroom for skb_shared_info. In the legacy-rx mode, driver can only configure up to 2k sized Rx buffers and with the current configuration of 2k sized Rx buffers there is no way to do tailroom reservation for skb_shared_info. Hence size of Rx buffers is now lowered to 2048 - sizeof(skb_shared_info). Also, driver can only chain up to 5 Rx buffers and this means max MTU supported for legacy-rx is now 8614 (5 * rx_buffer_len - ETH header with VLAN). Signed-off-by: Tirthendu Sarkar <tirthendu.sarkar@intel.com> Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel) Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.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.
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.