David S. Miller 29d261466f Merge branch 'sch_sfq-derived-limit'
Octavian Purdila says:

====================
net_sched: sch_sfq: reject a derived limit of 1

Because sfq parameters can influence each other there can be
situations where although the user sets a limit of 2 it can be lowered
to 1:

$ tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 1 depth 1
$ tc qdisc show dev dummy0
qdisc sfq 1: dev dummy0 root refcnt 2 limit 1p quantum 1514b depth 1 divisor 1024

$ tc qdisc add dev dummy0 handle 1: root sfq limit 2 flows 10 depth 1 divisor 1
$ tc qdisc show dev dummy0
qdisc sfq 2: root refcnt 2 limit 1p quantum 1514b depth 1 divisor 1

As a limit of 1 is invalid, this patch series moves the limit
validation to after all configuration changes have been done. To do
so, the configuration is done in a temporary work area then applied to
the internal state.

The patch series also adds new test cases.

v3:
 - remove a couple of unnecessary comments
 - rearrange local variables to use reverse Christmas tree style
   declaration order

v2: https://lore.kernel.org/all/20250402162750.1671155-1-tavip@google.com/
 - remove tmp struct and directly use local variables

v1: https://lore.kernel.org/all/20250328201634.3876474-1-tavip@google.com/
===================

Signed-off-by: David S. Miller <davem@davemloft.net>
2025-04-09 12:55:48 +01:00
2025-02-19 14:53:27 -07:00

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 reStructuredText 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.
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