From: Rik van Riel <riel@redhat.com>
To: yogeshwar sonawane <yogyas@gmail.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: How much kernel memory is in 64-bit OS ?
Date: Sun, 17 Sep 2006 20:10:06 -0400 [thread overview]
Message-ID: <450DE3DE.50301@redhat.com> (raw)
In-Reply-To: <b681c62b0609160434g6ccbbaa0vd0cd68958696726e@mail.gmail.com>
yogeshwar sonawane wrote:
> Hi all,
>
> We all know that in 32-bit OS, total 4GB memory space is divided in
> 3(user) + 1(kernel) space.
>
> Similarly, what is the division/scenario in case of 64-bit OS ?
It depends on the architecture.
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.
Sure, people said that too when going from 16 bits to 32 bits,
but that was only a factor 2^16 difference. This time it's the
square of the previous difference.
--
What is important? What you want to be true, or what is true?
next prev parent reply other threads:[~2006-09-18 0:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-16 11:34 How much kernel memory is in 64-bit OS ? yogeshwar sonawane
2006-09-18 0:10 ` Rik van Riel [this message]
2006-09-18 8:31 ` Andi Kleen
2006-09-18 8:35 ` Jan Engelhardt
2006-09-18 12:30 ` Rik van Riel
2006-09-18 12:34 ` Jan Engelhardt
2006-09-18 13:30 ` Kyle Moffett
2006-09-18 9:51 ` yogeshwar sonawane
2006-09-18 13:39 ` Helge Hafting
2006-09-18 17:22 ` Andi Kleen
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