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Executing dql_reset after setting a non-zero value for limit_min can lead to an unreasonable situation where dql->limit is less than dql->limit_min. For instance, after setting /sys/class/net/eth*/queues/tx-0/byte_queue_limits/limit_min, an ifconfig down/up operation might cause the ethernet driver to call netdev_tx_reset_queue, which in turn invokes dql_reset. In this case, dql->limit is reset to 0 while dql->limit_min remains non-zero value, which is unexpected. The limit should always be greater than or equal to limit_min. Signed-off-by: Jing Su <jingsusu@didiglobal.com> Link: https://patch.msgid.link/Z9qHD1s/NEuQBdgH@pilot-ThinkCentre-M930t-N000 Signed-off-by: Jakub Kicinski <kuba@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 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.