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[ Upstream commit b6b584562cbe7dc357083459d6dd5b171e12cadb ] The idea behind the warnings is that the user would get warned in case when more than one priority is configured for a given DSCP value on a netdevice. The warning is currently wrong, because dcb_ieee_getapp_mask() returns the first matching entry, not all of them, and the warning will then claim that some priority is "current", when in fact it is not. But more importantly, the warning is misleading in general. Consider the following commands: # dcb app flush dev swp19 dscp-prio # dcb app add dev swp19 dscp-prio 24:3 # dcb app replace dev swp19 dscp-prio 24:2 The last command will issue the following warning: mlxsw_spectrum3 0000:07:00.0 swp19: Ignoring new priority 2 for DSCP 24 in favor of current value of 3 The reason is that the "replace" command works by first adding the new value, and then removing all old values. This is the only way to make the replacement without causing the traffic to be prioritized to whatever the chip defaults to. The warning is issued in response to adding the new priority, and then no warning is shown when the old priority is removed. The upshot is that the canonical way to change traffic prioritization always produces a warning about ignoring the new priority, but what gets configured is in fact what the user intended. An option to just emit warning every time that the prioritization changes just to make it clear that it happened is obviously unsatisfactory. Therefore, in this patch, remove the warnings. Reported-by: Maksym Yaremchuk <maksymy@nvidia.com> Signed-off-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@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.