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Date: Tue, 22 Apr 2014 13:01:51 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Jiang Liu <jiang.liu@linux.intel.com>, Ingo Molnar <mingo@kernel.org>,
        Ingo Molnar <mingo@redhat.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
        Tony Luck <tony.luck@intel.com>, linux-kernel@vger.kernel.org
Subject: Re: [Bugfix] sched: fix possible invalid memory access caused by
 CPU hot-addition
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On Tue, 22 Apr 2014 10:15:15 +0200 Peter Zijlstra <peterz@infradead.org> wrote:

> On Tue, Apr 22, 2014 at 01:27:15PM +0800, Jiang Liu wrote:
> > When calling kzalloc_node(size, flags, node), we should first check
> > whether node is onlined, otherwise it may cause invalid memory access
> > as below.
> 
> But this is only for memory less node crap, right? 

um, why are memoryless nodes crap?