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Linux kernel source tree
5e37d8254e
Add header buffers and ethtool support to enable header split via the tcp-data-split flag in ethtool's ringparam config. A coherent dma memory is allocated for the header buffers. There is one header buffer per ring entry by calculating the offset to the header-buffers starting address. The header buffer is always copied directly into the skb and payload is always added as frags. When there is a header buffer overflow or the header length is 0, the driver places the whole unsplit packet in frags. When toggling header split, the driver will call gve_adjust_config to set its queues appropriately. If header split is enabled by the user and the max packet buffer size is no less than 4KB, driver will set the packet buffer size as 4KB to support TCP_ZEROCOPY_RECEIVE. Otherwise the driver will use the default 2KB as the packet buffer size. `ethtool -G <dev> tcp-data-split on/off` is the command to toggle header split. `ethtool -g <dev>` will show the status of header split with the field of `tcp-data-split`. Co-developed-by: Ziwei Xiao <ziweixiao@google.com> Signed-off-by: Ziwei Xiao <ziweixiao@google.com> Signed-off-by: Jeroen de Borst <jeroendb@google.com> Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com> Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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.