linux-kernel - Re: [patch 61/66] timers: Convert to hotplug state machine

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Date:	Tue, 26 Jul 2016 16:15:50 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jon Hunter <jonathanh@...dia.com>
cc:	rcochran@...utronix.de,
	Anna-Maria Gleixner <anna-maria@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [patch 61/66] timers: Convert to hotplug state machine

Jon,

On Tue, 26 Jul 2016, Jon Hunter wrote:
> On 25/07/16 16:35, rcochran@...utronix.de wrote:
> > Just to be sure, this problem didn't exist before the HP rework, that
> > is, suspend worked fine with and without CONFIG_PREEMPT, right?
> 
> Correct. I test suspend on Tegra with both multi_v7_defconfig
> (CONFIG_PREEMPT disabled) and tegra_defconfig (CONFIG_PREEMPT enabled).
> Looking at the git history for these configs I don't see any changes in
> this regard since they were added (unless some underlying Kconfig files
> have changed).

Is that fully reproducible, i.e on every suspend?

Can you please check whether this issue happens with just cpu offline as
well? I.e. set a cpu (or all non-boot cpus) offline, wait long enough that the
stall detector can trigger, set the cpu(s) online again and repeat.

Thanks

	tglx