linux-kernel - Re: [RFC 0/2] Delay initializing of large sections of memory

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Message-ID: <CAE9FiQX3Opcv0E7+PXNAUoJtgoa0Cxv5wOK=R_ERvQjN79poXQ@mail.gmail.com>
Date:	Fri, 21 Jun 2013 11:44:22 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Nathan Zimmer <nzimmer@....com>, Robin Holt <holt@....com>,
	Mike Travis <travis@....com>, Rob Landley <rob@...dley.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	linux-doc@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 0/2] Delay initializing of large sections of memory

On Fri, Jun 21, 2013 at 10:03 AM, H. Peter Anvin <hpa@...or.com> wrote:
> On 06/21/2013 09:51 AM, Greg KH wrote:
>
> I suspect the cutoff for this should be a lot lower than 8 TB even, more
> like 128 GB or so.  The only concern is to not set the cutoff so low
> that we can end up running out of memory or with suboptimal NUMA
> placement just because of this.

I would suggest another way:
only boot the system with boot node (include cpu, ram and pci root buses).
then after boot, could add other nodes.

or something like pxm_mask or node_mask to select boot nodes.

Thanks

Yinghai
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