linux-kernel - Re: [RFC Patch V1 21/30] mm, irqchip: Use cpu_to_mem()/numa_mem

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Message-ID: <20140718124038.GE24496@titan.lakedaemon.net>
Date:	Fri, 18 Jul 2014 08:40:38 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Jiang Liu <jiang.liu@...ux.intel.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	David Rientjes <rientjes@...gle.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alexander Shiyan <shc_work@...l.ru>,
	Tony Luck <tony.luck@...el.com>, linux-mm@...ck.org,
	linux-hotplug@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC Patch V1 21/30] mm, irqchip: Use
 cpu_to_mem()/numa_mem_id() to support memoryless node

On Fri, Jul 11, 2014 at 03:37:38PM +0800, Jiang Liu wrote:
> When CONFIG_HAVE_MEMORYLESS_NODES is enabled, cpu_to_node()/numa_node_id()
> may return a node without memory, and later cause system failure/panic
> when calling kmalloc_node() and friends with returned node id.
> So use cpu_to_mem()/numa_mem_id() instead to get the nearest node with
> memory for the/current cpu.
> 
> If CONFIG_HAVE_MEMORYLESS_NODES is disabled, cpu_to_mem()/numa_mem_id()
> is the same as cpu_to_node()/numa_node_id().
> 
> Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
> ---
>  drivers/irqchip/irq-clps711x.c |    2 +-
>  drivers/irqchip/irq-gic.c      |    2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)

Do you have anything depending on this?  Can apply it to irqchip?  If
you need to keep it with other changes,

Acked-by: Jason Cooper <jason@...edaemon.net>

But please do let me know if I can take it.

thx,

Jason.
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