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Jakub Kicinski 54ea680b75 selftests: net: give up on the cmsg_time accuracy on slow machines 
Commit b9d5f5711d ("selftests: net: increase the delay for relative
cmsg_time.sh test") widened the accepted value range 8x but we still
see flakes (at a rate of around 7%).

Return XFAIL for the most timing sensitive test on slow machines.

Before:

  # ./cmsg_time.sh
    Case UDPv4  - TXTIME rel returned '8074us - 7397us < 4000', expected 'OK'
  FAIL - 1/36 cases failed

After:

  # ./cmsg_time.sh
    Case UDPv4  - TXTIME rel returned '1123us - 941us < 500', expected 'OK' (XFAIL)
    Case UDPv6  - TXTIME rel returned '1227us - 776us < 500', expected 'OK' (XFAIL)
  OK

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250116020105.931338-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
History 2025-01-17 18:36:14 -08:00
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README

README 

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.