linux-kernel - Re: [PATCh] x86: overmapped fix when 4K pages on tail

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Message-ID: <86802c440807131200o34568304mb1bbd84baea4faa6@mail.gmail.com>
Date:	Sun, 13 Jul 2008 12:00:02 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Andi Kleen" <andi@...stfloor.org>
Cc:	"Arjan van de Ven" <arjan@...radead.org>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Suresh Siddha" <suresh.b.siddha@...el.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCh] x86: overmapped fix when 4K pages on tail - 64bit

On Sun, Jul 13, 2008 at 11:48 AM, Andi Kleen <andi@...stfloor.org> wrote:
>
>> with this patch, my 256g system still use gbpages for 1g-3g, 4g-256g
>
> 256GB certainly qualifies as "large system". But as Linus always says:
> Linux is not for servers only. Ignoring the small systems makes you
> look bad.

You want system with 2g use gbpage too?
that is because of acpi nvs or smm code sit near the RAM.... why we
need to direct map these area?

YH
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