linux-kernel - Re: [Query] Can we use normal timers (kernel/timer.c) while in NO_HZ

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Message-ID: <20140604140650.GE13827@localhost.localdomain>
Date:	Wed, 4 Jun 2014 16:06:52 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Kevin Hilman <khilman@...aro.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Lists linaro-kernel <linaro-kernel@...ts.linaro.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linaro Networking <linaro-networking@...aro.org>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>
Subject: Re: [Query] Can we use normal timers (kernel/timer.c) while in
 NO_HZ_FULL mode?

On Wed, Jun 04, 2014 at 07:23:20PM +0530, Viresh Kumar wrote:
> On 4 June 2014 19:14, Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > BTW, shouldn't we do something similar for mod_timer_pinned()
> > as well ?
> 
> Also, as we aren't forcing get_nohz_timer_target() to _not_ return
> a NO_HZ_FULL, we might end up queuing a timer on NO_HZ_FULL
> cpu with the unpinned timer APIs. And the same question might
> stand true for this case as well?

Right.
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