* Re: [PATCH] sched: idle: Avoid retaining the tick when it has been stopped
[not found] <2161372.IsD4PDzmmY@aspire.rjw.lan>
@ 2018-08-21 23:21 ` Tony Lindgren
0 siblings, 0 replies; only message in thread
From: Tony Lindgren @ 2018-08-21 23:21 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: Peter Zijlstra, Linux PM, LKML, Frederic Weisbecker, Ingo Molnar,
Leo Yan, Mark Brown, Kevin Hilman, linux-omap
* Rafael J. Wysocki <rjw@rjwysocki.net> [691231 23:00]:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
>
> 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
kernelci.org and Mark Brown earlier at [0].
At least so far no boot hangs for me with this fix, so:
Tested-by: Tony Lindgren <tony@atomide.com>
[0] https://www.spinics.net/lists/linux-mmc/msg50480.html
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2018-08-21 23:21 ` [PATCH] sched: idle: Avoid retaining the tick when it has been stopped Tony Lindgren
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