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When XSK pool uses need_wakeup feature, correlate -ENOBUFS that was returned from xdp_do_redirect() with a XSK Rx queue being full. In such case, terminate the Rx processing that is being done on the current HW Rx ring and let the user space consume descriptors from XSK Rx queue so that there is room that driver can use later on. Introduce new internal return code I40E_XDP_EXIT that will indicate case described above. Note that it does not affect Tx processing that is bound to the same NAPI context, nor the other Rx rings. Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20220413153015.453864-7-maciej.fijalkowski@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.