linux-kernel - RE: x86-32 PAE-enabled kernel fails to boot with 64GB of RAM

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Date:	Tue, 20 Dec 2011 22:34:55 -0800
From:	Yuhong Bao <yuhongbao_386@...mail.com>
To:	<hpa@...nel.org>, <mhocko@...e.cz>
CC:	<lacombar@...il.com>, <x86@...nel.org>,
	<linux-kernel@...r.kernel.org>
Subject: RE: x86-32 PAE-enabled kernel fails to boot with 64GB of RAM


> On 12/06/2011 02:26 AM, Michal Hocko wrote:
> >
> > Quoting from Documentation/vm/highmem.txt:
> > "
> > The general recommendation is that you don't use more than 8GiB on a
> > 32-bit machine - although more might work for you and your workload,
> > you're pretty much on your own - don't expect kernel developers to
> > really care much if things come apart.
> > "
> >
>
> Still, I suspect the failure to cap the memory space... it still
> *should* at least limp along. But yes, at some point the wheels really
> will just come off the bus.
>
> Does specifying a kernel"mem=" option (thereby capping the memory
> artificially) work?

FYI Windows when set to 3G/1G VA split with PAE enabled caps to 16GB of RAM.
Yuhong Bao 		 	   		  --
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