linux-kernel - Re: [tip:smp/hotplug] cpu/hotplug: Prevent alloc/free of irq descriptors during CPU up/down (again)

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Date:	Thu, 11 Aug 2016 10:11:20 -0400
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de, jgross@...e.com,
	torvalds@...ux-foundation.org, mingo@...nel.org, hpa@...or.com,
	peterz@...radead.org, anna-maria@...utronix.de,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:smp/hotplug] cpu/hotplug: Prevent alloc/free of irq
 descriptors during CPU up/down (again)

On 08/11/2016 09:20 AM, Sebastian Andrzej Siewior wrote:
> On 2016-08-11 08:53:31 [-0400], Boris Ostrovsky wrote:
>> Since this patch requires
>> http://marc.info/?l=xen-devel&m=147024499722041&w=2 it may be better to
>> take it via Xen tree.
> 
> Why are you adding more register_cpu_notifier() users?


Are you asking why this is not using new hotplug infrastructure?

This should indeed be done but not as part of this series. Here we are
solving a specific problem and part of this is allowing PV guests use
the same notifier that HVM guests already do.


-boris