From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Vatika Harlalka <vatikaharlalka@gmail.com>,
Chris Metcalf <cmetcalf@ezchip.com>,
Thomas Gleixner <tglx@linutronix.de>,
Preeti U Murthy <preeti@linux.vnet.ibm.com>,
Christoph Lameter <cl@linux.com>
Subject: Re: [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers
Date: Mon, 24 Aug 2015 16:01:19 +0200 [thread overview]
Message-ID: <1440424879.3670.42.camel@gmail.com> (raw)
In-Reply-To: <20150824133559.GA27147@lerouge>
On Mon, 2015-08-24 at 15:36 +0200, Frederic Weisbecker wrote:
> On Mon, Aug 24, 2015 at 08:44:12AM +0200, Ingo Molnar wrote:
> > 2)
> >
> > What happens if the boot CPU is offlined? (under CONFIG_BOOTPARAM_HOTPLUG_CPU0=y)
> >
> > I don't see CPU hotplug callbacks fixing up the housekeeping_mask if the boot CPU
> > is offlined.
>
> We have tick_nohz_cpu_down_callback() which makes sure that the timekeeper, which
> is the boot CPU in nohz full, never gets offlined.
Aha.. and it works fine too. (CPU0 told me to go away earlier;)
-Mike
next prev parent reply other threads:[~2015-08-24 14:01 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-14 1:46 [PATCH RESEND] sched/nohz: Affine unpinned timers to housekeepers Frederic Weisbecker
2015-08-22 21:09 ` Ping: " Frederic Weisbecker
2015-08-23 1:22 ` Christoph Lameter
2015-08-23 5:40 ` Ingo Molnar
2015-08-23 16:01 ` Paul E. McKenney
2015-08-24 1:28 ` Frederic Weisbecker
2015-08-24 6:44 ` Ingo Molnar
2015-08-24 7:23 ` Mike Galbraith
2015-08-24 7:41 ` Ingo Molnar
2015-08-24 7:54 ` Mike Galbraith
2015-08-24 8:00 ` Ingo Molnar
2015-08-24 13:36 ` Frederic Weisbecker
2015-08-24 14:01 ` Mike Galbraith [this message]
2015-08-25 8:29 ` Ingo Molnar
2015-08-25 13:45 ` Frederic Weisbecker
2015-08-28 8:32 ` Ingo Molnar
2015-08-28 12:30 ` Frederic Weisbecker
2015-08-24 13:50 ` Paul E. McKenney
2015-08-24 14:04 ` Frederic Weisbecker
2015-08-24 15:45 ` Paul E. McKenney
2015-08-24 1:45 ` Frederic Weisbecker
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