linux-kernel - Re: [PATCH 3.10 005/103] irqchip: Gic: Support forced affinity setting

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Message-ID: <20140623111756.GY24291@sirena.org.uk>
Date:	Mon, 23 Jun 2014 12:17:56 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Mark Rutland <mark.rutland@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	sudeep.holla@....com, linux@....linux.org.uk
Subject: Re: [PATCH 3.10 005/103] irqchip: Gic: Support forced affinity
 setting

On Thu, Jun 05, 2014 at 11:05:24AM -0700, Greg Kroah-Hartman wrote:
> On Thu, Jun 05, 2014 at 05:05:00PM +0100, Mark Rutland wrote:

> > This patch alone has the possiblity of breaking CPU hotplug on arm and
> > arm64 (specifically it breaks hot unplugging CPU0 where interrupts may
> > be left targetting the offline CPU).

...

> > Unfortunately there is not an equivalent fix for arm - Russell objected
> > to the approach [2,3,4], and that's not yet settled.

> Ok, be sure to cc: stable on the patch when it goes into the tree and
> I'll pick it up then.

Sadly that fix still hasn't materialised so stable remains broken for
ARM.  The discussion was restarted on Friday but Russell is looking to
Thomas for input.

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