linux-kernel - Re: [patch-rt] hotplug, hrtimer: Migrate expired/deferred timers during cpu offline

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Date:   Thu, 17 Aug 2017 19:37:50 +0200
From:   Mike Galbraith <efault@....de>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [patch-rt] hotplug, hrtimer: Migrate expired/deferred timers
 during cpu offline

On Thu, 2017-08-17 at 19:26 +0200, Mike Galbraith wrote:
> On Thu, 2017-08-17 at 19:17 +0200, Sebastian Andrzej Siewior wrote:
> > On 2017-08-17 18:50:42 [+0200], To Mike Galbraith wrote:
> > > __remove_hrtimer() shouldn't be required because it has been done
> > > already. It should be enough to just list_splice() one list to the
> > > other and raise the softirq afterwards.
> > 
> > Mike, can you check this please:
> 
> Yeah, will do.

BTW, with holes stopped up, 8 socket box took a hefty beating for 20
hours.  It was actually 4.12, but it's the same code, just rolled
forward.  This is hotplug code is looking pretty darn durable.

	-Mike