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  1. Bug #1424526
  2. Comment #36

Comment 36 for bug 1424526

Revision history for this message
Michael Snoyman (michael-snoyman) wrote : Re: Unable to boot from installation media

I haven't looked into the commit yet, but the bisect ended at:

0e576acbc1d9600cf2d9b4a141a2554639959d50 is the first bad commit
commit 0e576acbc1d9600cf2d9b4a141a2554639959d50
Author: Thomas Gleixner <email address hidden>
Date: Fri Nov 29 12:18:13 2013 +0100

    nohz: Fix another inconsistency between CONFIG_NO_HZ=n and nohz=off

    If CONFIG_NO_HZ=n tick_nohz_get_sleep_length() returns NSEC_PER_SEC/HZ.

    If CONFIG_NO_HZ=y and the nohz functionality is disabled via the
    command line option "nohz=off" or not enabled due to missing hardware
    support, then tick_nohz_get_sleep_length() returns 0. That happens
    because ts->sleep_length is never set in that case.

    Set it to NSEC_PER_SEC/HZ when the NOHZ mode is inactive.

    Reported-by: Michal Hocko <email address hidden>
    Reported-by: Borislav Petkov <email address hidden>
    Signed-off-by: Thomas Gleixner <email address hidden>

:040000 040000 e98d34fcc56a28e516d6282265f2de29bc0f4ad6 ec91edd6b6c6548dc58410a052c5fbc59f12690b M kernel