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Date: Thu, 26 Sep 2013 11:48:13 -0400
From: Tejun Heo <tj@kernel.org>
To: Zhang Yanfei <zhangyanfei.yes@gmail.com>
Cc: "Rafael J . Wysocki" <rjw@sisk.pl>, lenb@kernel.org,
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        Lai Jiangshan <laijs@cn.fujitsu.com>, isimatu.yasuaki@jp.fujitsu.com,
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Subject: Re: [PATCH v5 4/6] x86/mem-hotplug: Support initialize page tables
 in bottom-up
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On Thu, Sep 26, 2013 at 11:43:02PM +0800, Zhang Yanfei wrote:
> > As Yinghai pointed out in another thread, do we need to worry about
> > falling back to top-down?
> 
> I've explained to him. Nop, we don't need to worry about that. Because even
> the min_pfn_mapped becomes ISA_END_ADDRESS in the second call below, we won't
> allocate memory below the kernel because we have limited the allocation above
> the kernel.

Maybe I misunderstood but wasn't he worrying about there not being
enough space above kernel?  In that case, it'd automatically fall back
to top-down allocation anyway, right?

Thanks.

-- 
tejun
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