[Bug 2129005] [NEW] tc class show dev provides incorrect value for cburst

[Frode Nordahl]

Public bug reported:

As detected by the ovn system testsuite the following test fails when
upgrading iprotue2 from 6.14 to more recent versions:

    egress qos

The command being executed by the testsuite is:

    tc class show dev ovs-public

And the printed value becomes:

    class htb 1:2 parent 1:fffe prio 0 rate 12Kbit ceil 34359Mbit burst
375000b cburst 374933b

While the expected output is:

    class htb 1:2 parent 1:fffe prio 0 rate 12Kbit ceil 34359Mbit burst
375000b cburst 373662b

The issue appears to be present in iproute2 versions 6.17.0-1,
6.16.0-1ubuntu2

Downgrading to 6.14.0-1ubuntu1 makes the problem go away.

** Affects: iproute2 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: ovn (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: update-excuse

** Package changed: openvswitch (Ubuntu) => iproute2 (Ubuntu)

** Also affects: ovn (Ubuntu)
   Importance: Undecided
       Status: New

** Tags added: update-excuse

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https://bugs.launchpad.net/bugs/2129005

Title:
  tc class show dev provides incorrect value for cburst

Status in iproute2 package in Ubuntu:
  New
Status in ovn package in Ubuntu:
  New

Bug description:
  As detected by the ovn system testsuite the following test fails when
  upgrading iprotue2 from 6.14 to more recent versions:

      egress qos

  The command being executed by the testsuite is:

      tc class show dev ovs-public

  And the printed value becomes:

      class htb 1:2 parent 1:fffe prio 0 rate 12Kbit ceil 34359Mbit
  burst 375000b cburst 374933b

  While the expected output is:

      class htb 1:2 parent 1:fffe prio 0 rate 12Kbit ceil 34359Mbit
  burst 375000b cburst 373662b

  The issue appears to be present in iproute2 versions 6.17.0-1,
  6.16.0-1ubuntu2

  Downgrading to 6.14.0-1ubuntu1 makes the problem go away.

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