415446185b
If there are not enough resources to allocate one TX queue per core for XDP TX it was completely disabled. This patch implements a fallback solution for sharing the available queues using __netif_tx_lock for synchronization. In the normal case that there is one TX queue per CPU, no locking is done, as it was before. With this fallback solution, XDP TX will work in much more cases that were failing, specially in machines with many CPUs. It's hard for XDP users to know what features are supported across different NICs and configurations, so they will benefit on having wider support. Signed-off-by: Íñigo Huguet <ihuguet@redhat.com> 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.