canonical-ubuntu-qa team mailing list archive

[Jürg Häfliger <1891528@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1891528

Title:
  fix ftrace pid filtering on linux 5.8

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Groovy:
  Fix Released

Bug description:
  A couple of ftrace kernel self test regression tests are failing on
  systems with 1 CPU, notably small 1 CPU cloud instances. The two
  tests that are failing are:

  [20] ftrace - function graph filters with stack tracer  
  [21] ftrace - function graph filters    

  Bisected this down to commit 717e3f5ebc82 ("ftrace: Make function
  trace pid filtering a bit more exact") in linux 5.6-rc4 and found
  and tested an upstream fix to this issue with the commit
  c58b6b0372de ("ftrace: Fix ftrace_trace_task return value").

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