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Date: Wed, 16 Apr 2008 20:48:16 +0200
From: Ingo Molnar <mingo@elte.hu>
To: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Johannes Weiner <hannes@saeurebad.de>, LKML <linux-kernel@vger.kernel.org>,
       Linux MM <linux-mm@kvack.org>, Andi Kleen <andi@firstfloor.org>,
       Yasunori Goto <y-goto@jp.fujitsu.com>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
       Christoph Lameter <clameter@sgi.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Subject: Re: [RFC][patch 2/5] mm: Node-setup agnostic free_bootmem()
Message-ID: <20080416184816.GA4400@elte.hu>
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* Yinghai Lu <yhlu.kernel@gmail.com> wrote:

> >  Yes, it should work well with cross nodes case.
> >
> >  but please add boundary check on free_bootmem_node too.
> 
> also please note: it will have problem span nodes box.
> 
> for example: node 0: 0-2g, 4-6g, node1: 2-4g, 6-8g. and if ramdisk sit 
> creoss 2G boundary. you will only free the range before 2g.

yes. Such systems _will_ become more common - so the "this is rare" 
arguments are incorrect. bootmem has to be robust enough to deal with 
it.

	Ingo