linux-kernel - Re: [PATCH Bug fix] acpi, movablemem_map: node0 should always be unhotpluggable when using SRAT.

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Date:	Wed, 30 Jan 2013 00:50:26 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Tang Chen <tangchen@...fujitsu.com>
cc:	akpm@...ux-foundation.org, jiang.liu@...wei.com,
	wujianguo@...wei.com, hpa@...or.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, linfeng@...fujitsu.com, yinghai@...nel.org,
	isimatu.yasuaki@...fujitsu.com, rob@...dley.net,
	kosaki.motohiro@...fujitsu.com, minchan.kim@...il.com,
	mgorman@...e.de, guz.fnst@...fujitsu.com, rusty@...tcorp.com.au,
	lliubbo@...il.com, jaegeuk.hanse@...il.com, tony.luck@...el.com,
	glommer@...allels.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH Bug fix] acpi, movablemem_map: node0 should always be
 unhotpluggable when using SRAT.

On Wed, 30 Jan 2013, Tang Chen wrote:

> When using movablemem_map=acpi, always set node0 as unhotpluggable, otherwise
> if all the memory is hotpluggable, the kernel will fail to boot.
> 
> When using movablemem_map=nn[KMG]@ss[KMG], we don't stop users specifying
> node0 as hotpluggable, and ignore all the info in SRAT, so that this option
> can be used as a workaround of firmware bugs.
> 

Could you elaborate on the failure you're seeing?

I've booted the kernel many times without memory on a node 0.
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