Ubuntu
linux package

  1. Lucid (10.04)
  2. Bug #493156
  3. Comment #20

Comment 20 for bug 493156

Revision history for this message
Paul Elliott (omahn) wrote :

SRU justification

IMPACT: Without this option enabled tools such as iotop are missing functionality that is extremely useful for diagnosing performance issues.

DEVELOPMENT BRANCH: The option CONFIG_TASK_DELAY_ACCT was enabled in Mavericks kernel 2.6.35-5.6 without any reported regressions.

PATCH: Simply enable CONFIG_TASK_DELAY_ACCT in next kernel release.

TEST CASE: Run iotop and check that SWAPIN and IO columns are populated.

REGRESSION POTENTIAL: Old reports exist of performance regressions with the option enabled, however these regressions have never been proven or quantified to the best of my knowledge and has never been witnessed at our site running kernels with the option enabled.