linux-kernel - Re: [RFC PATCH v4 2/4] genirq: add move

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Message-ID: <20150917220944.GX21084@n2100.arm.linux.org.uk>
Date:	Thu, 17 Sep 2015 23:09:44 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Marc Zyngier <marc.zyngier@....com>,
	Yang Yingliang <yangyingliang@...wei.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Mark Rutland <mark.rutland@....com>,
	Will Deacon <will.deacon@....com>,
	Hanjun Guo <hanjun.guo@...aro.org>
Subject: Re: [RFC PATCH v4 2/4] genirq: add move_irqs() for cpu hotplug

On Fri, Sep 18, 2015 at 12:04:06AM +0200, Thomas Gleixner wrote:
> On Thu, 17 Sep 2015, Marc Zyngier wrote:
> > I don't think having this prototype guarded by this #if is very useful.
> > You can probably leave it standalone.
> 
> Yes, there is no point if the function name is unique. Though
> move_irqs() is rather undescriptive. irq_break_affinities() might
> describe it quite well, but feel free to come up with soemthing better.

I don't think "irq_break_affinities" is anywhere near a good name - it's
not about always breaking affinities (moving an IRQ off one CPU onto
another within the current affinity setting does not break the affinity.)

irq_migrate_all()

irq_migrate_all_off_this_cpu()

irq_this_cpu_hotunplug()

irq_cpu_hotunplug()

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