From: "H. Peter Anvin" <hpa@zytor.com>
To: sidc7 <siddhartha.chhabra@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Kernel vs user memory
Date: Fri, 16 Jan 2009 22:38:59 -0800 [thread overview]
Message-ID: <49717D03.2030205@zytor.com> (raw)
In-Reply-To: <21513615.post@talk.nabble.com>
sidc7 wrote:
> If I am not mistaken, Linux kernel is a high memory kernel, hence for Linux
> kernel, nothing will be mapped to the kernel space, other than the memory
> beyond 896MB which is the kernel's virtual address space. Am I right on
> this?
It's a compilation option, and depends on the architecture. What you
described is true for an i386 kernel compiled as a highmem kernel. On
the other hand, a 64 bit kernel is *never* highmem.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-01-17 6:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-17 2:56 Kernel vs user memory sidc7
2009-01-17 4:16 ` Bryan Donlan
2009-01-17 4:21 ` sidc7
2009-01-17 5:26 ` Bryan Donlan
[not found] ` <49f90a801003181710v5e08ccc8jdd26ec899e75bdb9@mail.gmail.com>
2010-03-19 0:28 ` Bryan Donlan
[not found] ` <49f90a801003181747m5078d9c2y3cc8421203a7b1e6@mail.gmail.com>
2010-03-19 1:06 ` Bryan Donlan
2010-03-19 1:29 ` Siddhartha Chhabra
2009-01-17 6:26 ` H. Peter Anvin
2009-01-17 6:34 ` sidc7
2009-01-17 6:38 ` H. Peter Anvin [this message]
2009-01-17 6:42 ` sidc7
2009-01-17 7:27 ` H. Peter Anvin
2009-01-19 20:03 ` sidc7
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