Mailinglist Archive: opensuse-amd64 (36 mails)

[Patrick Shanahan <ptilopteri@xxxxxxxxx>]

* Erich Boleyn <erich@xxxxxxxx> [03-19-07 14:04]:
> "Joachim Deguara" <joachim.deguara@xxxxxxx> wrote:
> > James D. Parra wrote:
> > > Installed 4GB of physical memory, however only 3GB appear;
> > > 
> > > # cat /proc/meminfo
> > > MemTotal:      3342628 kB
> > 
> > It sounds like you need to go into the BIOS and ask for "Memwhole
> > remapping" and set it to "Software".  This happens because PCI takes
> > the address space from 3-4GB (staying under the 32bit boundary) and
> > maps over where memory may be so we want the BIOS to map that memory
> > elsewhere.
> 
> (disclaimer: I work for AMD in the CPU architecture team)
> 
> Remapping in the BIOS is possible with all current AMD parts:
>   --  First off, some BIOSes have bugs, so test it out before just using it!
> 
>   --  If this is a pre-rev-E part (C0 or CG), then you can perform
>       "Software" remapping, but it slows down memory access a bit
>       on Opteron systems.
> 
>   --  If this is a Rev E or later part, then you can perform "Hardware"
>       remapping as well, which has no performance cost.
> 
> I'd recommend using the "Hardware" method if you have a Rev E or later
> Opteron part.

And what to do for non-Opteron?  

I have AMD Athlon X86_64 4200+ K8 Tridon nForce 4 SLi GA-K8N Ultra-SLi
w/4 GB and show 3350428 kB

note:  I see no provision for remapping memory in the BIOS.

-- 
Patrick Shanahan                        Registered Linux User #207535
http://wahoo.no-ip.org                        @ http://counter.li.org
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        OpenSUSE Linux             http://en.opensuse.org/
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