linux-kernel - Re: How much kernel memory is in 64-bit OS ?

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Message-ID: <p73odtd4luu.fsf@verdi.suse.de>
Date:	18 Sep 2006 10:31:21 +0200
From:	Andi Kleen <ak@...e.de>
To:	Rik van Riel <riel@...hat.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, yogyas@...il.com
Subject: Re: How much kernel memory is in 64-bit OS ?

Rik van Riel <riel@...hat.com> writes:
> 
> However, all 64 bit architectures have one thing in common.
> There is so much address space available for both kernel and
> userspace that we won't have to worry about a shortage for a
> very long time.

Nearly.

The x86-64 port started off with a 512GB user space VM limit, and then
that later was extended with 4 level page tables because it wasn't
quite enough for everybody.

-Andi
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