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fec3b9ec47
Ilias Apalodimas says: ==================== net: netsec: Add XDP Support This is a respin of https://www.spinics.net/lists/netdev/msg526066.html Since page_pool API fixes are merged into net-next we can now safely use it's DMA mapping capabilities. First patch changes the buffer allocation from napi/netdev_alloc_frag() to page_pool API. Although this will lead to slightly reduced performance (on raw packet drops only) we can use the API for XDP buffer recycling. Another side effect is a slight increase in memory usage, due to using a single page per packet. The second patch adds XDP support on the driver. There's a bunch of interesting options that come up due to the single Tx queue. Locking is needed(to avoid messing up the Tx queues since ndo_xdp_xmit and the normal stack can co-exist). We also need to track down the 'buffer type' for TX and properly free or recycle the packet depending on it's nature. Changes since RFC: - Bug fixes from Jesper and Maciej - Added page pool API to retrieve the DMA direction Changes since v1: - Use page_pool_free correctly if xdp_rxq_info_reg() failed ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.