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Alexander Lobakin says: ==================== page_pool: allow direct bulk recycling Previously, there was no reliable way to check whether it's safe to use direct PP cache. The drivers were passing @allow_direct to the PP recycling functions and that was it. Bulk recycling is used by xdp_return_frame_bulk() on .ndo_xdp_xmit() frames completion where the page origin is unknown, thus the direct recycling has never been tried. Now that we have at least 2 ways of checking if we're allowed to perform direct recycling -- pool->p.napi (Jakub) and pool->cpuid (Lorenzo), we can use them when doing bulk recycling as well. Just move that logic from the skb core to the PP core and call it before __page_pool_put_page() every time @allow_direct is false. Under high .ndo_xdp_xmit() traffic load, the win is 2-3% Pps assuming the sending driver uses xdp_return_frame_bulk() on Tx completion. ==================== Link: https://lore.kernel.org/r/20240329165507.3240110-1-aleksander.lobakin@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
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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 reStructuredText 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.