* Top 128MB of virtual address space
@ 2003-02-27 21:50 Raymond B. Jennings III
2003-02-27 22:11 ` William Lee Irwin III
0 siblings, 1 reply; 2+ messages in thread
From: Raymond B. Jennings III @ 2003-02-27 21:50 UTC (permalink / raw)
To: linux-mm
For linux running on an Intel machine without PAE, the top 128MB of
virtual address space:
If
PKMAP_BASE = FE000000
and
FIXADDR_START=FFF55000
That leaves a 32MB area. I believe the permanent highmem mappings are
1024 pages so that leaves 28MB of address space. What is this space
used for if anything?
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* Re: Top 128MB of virtual address space
2003-02-27 21:50 Top 128MB of virtual address space Raymond B. Jennings III
@ 2003-02-27 22:11 ` William Lee Irwin III
0 siblings, 0 replies; 2+ messages in thread
From: William Lee Irwin III @ 2003-02-27 22:11 UTC (permalink / raw)
To: Raymond B. Jennings III; +Cc: linux-mm
On Thu, Feb 27, 2003 at 04:50:42PM -0500, Raymond B. Jennings III wrote:
> For linux running on an Intel machine without PAE, the top 128MB of
> virtual address space:
> If
> PKMAP_BASE = FE000000
> and
> FIXADDR_START=FFF55000
> That leaves a 32MB area. I believe the permanent highmem mappings are
> 1024 pages so that leaves 28MB of address space. What is this space
> used for if anything?
Nothing. This is fixed in 2.5
-- wli
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