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Date:	Fri, 18 Jul 2014 08:40:38 -0400
From:	Jason Cooper <>
To:	Jiang Liu <>
Cc:	Andrew Morton <>,
	Mel Gorman <>,
	David Rientjes <>,
	Mike Galbraith <>,
	Peter Zijlstra <>,
	"Rafael J . Wysocki" <>,
	Thomas Gleixner <>,
	Alexander Shiyan <>,
	Tony Luck <>,,,,
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 <>
> ---
>  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 <>

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


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