22174f79a4
Build multi-buffer xdp using virtnet_build_xdp_buff_mrg(). For the prefilled buffer before xdp is set, we will probably use vq reset in the future. At the same time, virtio net currently uses comp pages, and bpf_xdp_frags_increase_tail() needs to calculate the tailroom of the last frag, which will involve the offset of the corresponding page and cause a negative value, so we disable tail increase by not setting xdp_rxq->frag_size. Signed-off-by: Heng Qi <hengqi@linux.alibaba.com> Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@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.