Re: Virtual address space exhaustion (was Discontigmem virt_to_page() )

From: Christoph Hellwig (
Date: Fri May 03 2002 - 14:24:52 EST

On Fri, May 03, 2002 at 03:17:35PM -0400, Richard B. Johnson wrote:
> On Fri, 3 May 2002, Christoph Hellwig wrote:
> > On Fri, May 03, 2002 at 03:01:48PM -0400, Richard B. Johnson wrote:
> > > The other Unix's I've become familiar are Sun-OS, the
> >
> > SunOS 5 uses separate address spaces on sparcv9 (32 and 64bit).
> > The same is true for many Linux ports, e.g. sparc64 or s390.
> >
> No no! I'm not talking about the physical address spaces. Many
> CPUs have separate address spaces for separate functions. I'm
> taking about the virtual address space that the process sees.
> There are no holes in this virtual address space of SunOS, and
> no "separate stuff" (I/O space) seen by a user-mode task.

This thread was about separate user/kernel VIRTUAL address spaces.
Not about holes, I/O spaces or other crap.
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