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Re: Memory in xen kernel < physical memory: msg#00093
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Subject: |
Re: Memory in xen kernel < physical memory |
Am Mittwoch, den 22.02.2006, 14:31 -0600 schrieb Steven Pritchard:
> On Wed, Feb 22, 2006 at 12:28:09PM -0800, Ben wrote:
> > I thought PAE was only for 32 bit machine? I've got a 64-bit opteron
> > and also noticed that the FC5t3 hypervisor kernel doesn't show all
> > 4GB of my RAM.
>
> A lot of Athlon64 boards only seem to support 3.5GB,
Most with Socket 939 support 4 GByte afaics.
> like the old
> Athlon MP boards. I haven't every been given a good reason why...
PCI-Address-Space just below 4 GByte needs around 0,25 up to round about
0,75 MByte normally (depending on PCI/PCIe/AGP devices you have
installed).
But most newer Mailboards support "Memory-Hoisting" (needs Rev. E Athons
iirc). Enable it in the BIOS and use a 64-Bit-Operating-System to access
the complete 4**GByte of memory.
--
Thorsten Leemhuis <fedora@xxxxxxxxxxxxx>
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