linux-kernel - Re: 2.6.32-rc3: low mem - only 378MB on x86

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Message-ID: <Pine.LNX.4.64.0910051439500.6589@winds.org>
Date:	Mon, 5 Oct 2009 14:42:48 -0400 (EDT)
From:	Byron Stanoszek <bstanoszek@...time.com>
To:	Jeff Chua <jeff.chua.linux@...il.com>
cc:	Linux Kernel <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hugh@...itas.com>
Subject: Re: 2.6.32-rc3: low mem - only 378MB on x86_32 with 64GB. Why?

On Mon, 5 Oct 2009, Jeff Chua wrote:

> Question is ... is there anyway to increase "low mem" without resorting to 
> migrating to 64bit? (Look... it only has 378MB total low mem vs 850MB on the 
> 4GB system). I've oracle installed on the 64GB system and it keeps getting 
> OOMs!

I have some installations using a 64-bit kernel and a 32-bit OS (including
Oracle). This setup works really well and lets you use all available memory.
You don't even have to upgrade your OS; just swap out the kernel.

  -Byron

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