Re: Hello

["Benjamin C.R. LaHaise" <blah@kvack.org>]

On Fri, 30 Apr 1999, Manfred Spraul wrote:

> If you need the patch I can send it to you.

=)  The most memory any of my machines have is 64 megs.  It would be nice
if more developers had systems with 4 gigs of memory...

> But I have a new idea: what about replacing the current 'shm' implementation
> with a high memory aware implementation.

> * it's very easy for the user mode programmers, no new interfaces.
> 
> I think that this implementation would required only a few hundred lines.
> 
> What do you think about this?

The implementation I saw Stephen post about is actually even better: add a
bit to page->flags to indicate that the memory is HIGH memory, which only
gets returned by get_free_page() if the caller inclues a GFP_HIGH_OKAY
flag.  Then, these pages can be used to fill in anonymous user mappings
and shared memory.  Presto chango, maybe a couple of hundred line patch
and you've got support for 4GB on intel, albeit with restrictions.  Then
the Xeon 36 bit page tables are a simple extension from there.

		-ben

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