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8f6c4ff9e0
FQ performs garbage collection at enqueue time, and only if number of flows is above a given threshold, which is hit after the qdisc has been used a bit. Since an RB-tree traversal is needed to locate a flow, it makes sense to perform gc all the time, to keep rb-trees smaller. This reduces by 50 % average storage costs in FQ, and avoids 1 cache line miss at enqueue time when fast path added in prior patch can not be used. Signed-off-by: Eric Dumazet <edumazet@google.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.