mainlining shenanigans
351876424e
Maxim Mikityanskiy says: ==================== HTB offload This series adds support for HTB offload to the HTB qdisc, and adds usage to mlx5 driver. The previous RFCs are available at [1], [2]. The feature is intended to solve the performance bottleneck caused by the single lock of the HTB qdisc, which prevents it from scaling well. The HTB algorithm itself is offloaded to the device, eliminating the need to take the root lock of HTB on every packet. Classification part is done in clsact (still in software) to avoid acquiring the lock, which imposes a limitation that filters can target only leaf classes. The speedup on Mellanox ConnectX-6 Dx was 14.2 times in the UDP multi-stream test, compared to software HTB implementation (more details in the mlx5 patch). [1]: https://www.spinics.net/lists/netdev/msg628422.html [2]: https://www.spinics.net/lists/netdev/msg663548.html v2 changes: Fixed sparse and smatch warnings. Formatted HTB patches to 80 chars per line. v3 changes: Fixed the CI failure on parisc with 16-bit xchg by replacing it with WRITE_ONCE. Fixed the capability bits in mlx5_ifc.h and the value of MLX5E_QOS_MAX_LEAF_NODES. v4 changes: Check if HTB is root when offloading. Add extack for hardware errors. Rephrase explanations of how it works in the commit message. Remove %hu from format strings. Add resiliency when leaf_del_last fails to create a new leaf node. ==================== Link: https://lore.kernel.org/r/20210119120815.463334-1-maximmi@mellanox.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 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.