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b63c5478e9
v3: - Report 'backlog' (bytes) instead of 'qlen' (number of packets) v2: - Fix sparse warning (use rcu_dereference) This patch adds support for the queue depth in IOAM trace data fields. The draft [1] says the following: The "queue depth" field is a 4-octet unsigned integer field. This field indicates the current length of the egress interface queue of the interface from where the packet is forwarded out. The queue depth is expressed as the current amount of memory buffers used by the queue (a packet could consume one or more memory buffers, depending on its size). An existing function (i.e., qdisc_qstats_qlen_backlog) is used to retrieve the current queue length without reinventing the wheel. Note: it was tested and qlen is increasing when an artificial delay is added on the egress with tc. [1] https://datatracker.ietf.org/doc/html/draft-ietf-ippm-ioam-data#section-5.4.2.7 Signed-off-by: Justin Iurman <justin.iurman@uliege.be> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.