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Alexander Lobakin
4f8ab26a03
cpumap has its own BH context based on kthread. It has a sane batch size of 8 frames per one cycle. GRO can be used here on its own. Adjust cpumap calls to the upper stack to use GRO API instead of netif_receive_skb_list() which processes skbs by batches, but doesn't involve GRO layer at all. In plenty of tests, GRO performs better than listed receiving even given that it has to calculate full frame checksums on the CPU. As GRO passes the skbs to the upper stack in the batches of @gro_normal_batch, i.e. 8 by default, and skb->dev points to the device where the frame comes from, it is enough to disable GRO netdev feature on it to completely restore the original behaviour: untouched frames will be being bulked and passed to the upper stack by 8, as it was with netif_receive_skb_list(). Tested-by: Daniel Xu <dxu@dxuuu.xyz> Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com> Signed-off-by: Paolo Abeni <pabeni@redhat.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 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.