linux-kernel - Re: [PATCH] genirq: fix virtual irq demuxer related comments

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Date:	Fri, 20 Feb 2015 16:12:59 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <Pawel.Moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] genirq: fix virtual irq demuxer related comments

Hi Peter,

On Tue, Feb 10, 2015 at 04:14:25PM +0000, Peter Zijlstra wrote:
> On Tue, Feb 10, 2015 at 04:43:12PM +0100, Boris Brezillon wrote:
> > Replace remaining 'Dumb' occurrences by 'Virtual'.
> > Remove inappropriate notes in kerneldoc headers.
> > 
> > Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> 
> Thanks, squished into the other one.

Would you be able to drop the virtual demuxer patch(es) for now?

The fundamental problem here is that a physical IRQ is shared by wakeup
and IRQF_NO_SUSPEND handlers. Neither the virtual demuxer nor the flag
approach solve that problem.

Boris and I have spoken on IRC and have some ideas as to what we could
do, but no code just yet.

Thanks,
Mark.
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