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Date:   Tue, 21 Aug 2018 16:21:44 -0700
From:   Tony Lindgren <>
To:     "Rafael J. Wysocki" <>
Cc:     Peter Zijlstra <>,
        Linux PM <>,
        LKML <>,
        Frederic Weisbecker <>,
        Ingo Molnar <>, Leo Yan <>,
        Mark Brown <>,
        Kevin Hilman <>,
Subject: Re: [PATCH] sched: idle: Avoid retaining the tick when it has been

* Rafael J. Wysocki <> [691231 23:00]:
> From: Rafael J. Wysocki <>
> If the tick has been stopped already, but the governor has not asked to
> stop it (which it can do sometimes), the idle loop should invoke
> tick_nohz_idle_stop_tick(), to let tick_nohz_stop_tick() take care
> of this case properly.
> Fixes: 554c8aa8ecad (sched: idle: Select idle state before stopping the tick)

This patch seems to fix an issue where boot hangs occasionally
on beagleboard-xm with ARM multi_v7_defconfig as reported by and Mark Brown earlier at [0].

At least so far no boot hangs for me with this fix, so:

Tested-by: Tony Lindgren <>


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