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[ Upstream commit 93775590b1ee98bf2976b1f4a1ed24e9ff76170f ] As of today tc-filter/chain events are unconditionally built and sent to RTNLGRP_TC. As with the introduction of rtnl_notify_needed we can check before-hand if they are really needed. This will help to alleviate system pressure when filters are concurrently added without the rtnl lock as in tc-flower. Reviewed-by: Jiri Pirko <jiri@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com> Link: https://lore.kernel.org/r/20231208192847.714940-8-pctammela@mojatatu.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Stable-dep-of: 369609fc6272 ("tc: Ensure we have enough buffer space when sending filter netlink notifications") Signed-off-by: Sasha Levin <sashal@kernel.org>
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.