2GB memory limit on Alpha?

[Phillip Ezolt]

Michael,

	You might want to try out Andrea's alpha bigmem patch:	

ftp://ftp.kernel.org/pub/linux/kernel/people/andrea/patches/v2.2/2.2.14/bigmem-2.2.14-7.gz

I just installed it my ES40, and it sees 4 gigs of memory:

[ezolt en cpu98 /tmp]$ free
Unknown HZ value! (4096) Assume 1024.
             total       used       free     shared    buffers     cached
Mem:       4101872     490184    3611688     743152      21896     374288
-/+ buffers/cache:      94000    4007872
Swap:       129016          0     129016

Cheers,
--Phil

Compaq:  High Performance Server Division/Benchmark Performance Engineering 
---------------- Alpha, The Fastest Processor on Earth --------------------
Phillip.Ezolt en compaq.com        |C|O|M|P|A|Q|        ezolt en perf.zko.dec.com
------------------- See the results at www.spec.org -----------------------

On Wed, 19 Jan 2000, Dr. Michael Weller wrote:

> Hi people,
> 
> I'm surprised there is a hard 2GB phys memory limit on Alpha although it
> seems the kernel (2.2.9 btw) uses 64bit pointers..
> 
> Is the test in arch/alpha/kernel/setup.c only a safety measure and I could
> safely remove it or are there architecture reasons for it (like the
> phys + virt/proc = 4GB for x86)? I thought there won't be such oddities
> on a 64bit system.
> 
> If some internal 32bit/paging table issue is the culprit here, would the
> high mem patch for decent x86 kernels address this problem too?
> (Currently 4GB phys on Alpha would suffice for me).
> 
> Any advice/comment is highly appreciated,
> Michael.
> 
> --
> 
> Michael Weller: eowmob en exp-math.uni-essen.de, eowmob en ms.exp-math.uni-essen.de,
> or even mat42b en spi.power.uni-essen.de. If you encounter an eowmob account on
> any machine in the net, it's very likely it's me.
> 
> 
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