linux-kernel - Re: [PATCH] numa, mem-hotplug: Fix stack overflow in numa when seting kernel nodes to unhotpluggable.

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Date:	Thu, 23 Jan 2014 14:36:44 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	Dave Jones <davej@...hat.com>,
	David Rientjes <rientjes@...gle.com>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com, akpm@...ux-foundation.org,
	zhangyanfei@...fujitsu.com, guz.fnst@...fujitsu.com,
	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] numa, mem-hotplug: Fix stack overflow in numa when seting
 kernel nodes to unhotpluggable.

On 01/23/2014 02:13 PM, Dave Jones wrote:
> On Wed, Jan 22, 2014 at 10:06:14PM -0800, David Rientjes wrote:
>   >  On Thu, 23 Jan 2014, Tang Chen wrote:
>   >
......
>   >
>   >  I guess it depends on what Dave's CONFIG_NODES_SHIFT is?
>
> It's 10, because I had MAXSMP set.
>
> So, MAX_NUMNODES = 1<<  10
>
> And the bitmask is made of longs. 1024 of them.
>
> How does this work ?

I have the same config with you.

Would you please try it for me ?  Does it work on your box ?

I cannot reproduce this problem on the latest kernel.
But I can reproduce it on 3.10.

Thanks

>
> 	Dave
>
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