From: Gregory CLEMENT <gregory.clement@free-electrons.com>
To: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org,
Tawfik Bayouk <tawfik@marvell.com>,
Nadav Haklai <nadavh@marvell.com>,
Lior Amsalem <alior@marvell.com>,
Ezequiel Garcia <ezequiel.garcia@free-electrons.com>,
devicetree@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/17] irqchip: irq-armada-370-xp: suspend/resume support
Date: Mon, 03 Nov 2014 18:38:10 +0100 [thread overview]
Message-ID: <5457BD82.3090309@free-electrons.com> (raw)
In-Reply-To: <1414151970-6626-5-git-send-email-thomas.petazzoni@free-electrons.com>
Hi Thomas,
On 24/10/2014 13:59, Thomas Petazzoni wrote:
> This commit adds suspend/resume support to the irqchip driver used on
> Armada XP platforms (amongst others). It does so by adding a set of
> suspend/resume syscore_ops, that will respectively save and restore
> the necessary registers to ensure interrupts continue to work after
> resume.
>
> It is worth mentioning that the affinity is lost during a
> suspend/resume cycle, because when a secondary CPU is brought
> off-line, all interrupts that are assigned to this CPU in terms of
> affinity gets re-assigned to a still running CPU. Therefore, right
> before entering suspend, all interrupts are assigned to the boot CPU.
So what about /proc/irq/*/smp_affinity ?
Do this files still represent accurate information?
Thanks,
Gregory
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
next prev parent reply other threads:[~2014-11-03 17:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1414151970-6626-1-git-send-email-thomas.petazzoni@free-electrons.com>
2014-10-24 11:59 ` [PATCH 03/17] irqchip: irq-armada-370-xp: use proper return value for ->set_affinity() Thomas Petazzoni
2014-11-03 17:20 ` Gregory CLEMENT
2014-11-07 4:09 ` Jason Cooper
2014-10-24 11:59 ` [PATCH 04/17] irqchip: irq-armada-370-xp: suspend/resume support Thomas Petazzoni
2014-11-03 17:38 ` Gregory CLEMENT [this message]
2014-11-13 16:32 ` Thomas Petazzoni
2014-10-24 11:59 ` [PATCH 05/17] clocksource: time-armada-370-xp: add " Thomas Petazzoni
2014-11-03 17:45 ` Gregory CLEMENT
2014-10-24 11:59 ` [PATCH 09/17] clk: mvebu: add suspend/resume for gatable clocks Thomas Petazzoni
2014-11-04 9:32 ` Gregory CLEMENT
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