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RE: [Xen-users] VT 64bit kernel with >4Gb RAM

To: "'Guillaume Lenoir'" <glenoir@xxxxxxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] VT 64bit kernel with >4Gb RAM
From: "Luis Raddatz L." <luis.raddatz@xxxxxx>
Date: Fri, 22 Sep 2006 16:51:36 -0400
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I have a 2950 too, with 8Gb of memory.
I'm using FedoraCore5 64 bits, and you are right, with 64 bits OS, you don't
need a PAE-kernel.
I just download the sources of Xen, using mercurial and compile it.
(I have a lot of problems using precompiled packages, so don't loose your
time, compile your own xen-kernel)


-----Mensaje original-----
De: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] En nombre de Guillaume Lenoir
Enviado el: Martes, 19 de Septiembre de 2006 11:13
Para: xen-users@xxxxxxxxxxxxxxxxxxx
Asunto: [Xen-users] VT 64bit kernel with >4Gb RAM

    Hi there,
I have the lucky task to setup a Xen system.
my plateform is a dell 2950 with 16Gb of RAM.

I got as far as setting up debian sarge and xen following
and overcoming some specific difficulties
(http://kmuto.jp/b.cgi/debian/d-i-2615.htm &

But, my concern now, while I'm struglling to setup my 1rst VM, is that I
don't see all the RAM.
Still I 'm using both dual cores as cat /proc/cpuinfo lists 4 processors

>From my understanding, if I had a 64bit kernel I'd see them (pae beeing
only for 32bit systems, right ?)
And I'm guessing if I want to VMise 64bit OSes, I'll need it.

So :
Is there a debian prepackaged kernel that'd do the trick, or do I have
to compile my own ?
In the afirmative, what patch should I apply and where is that friendly
64bit option ?
Is there something else I'm missing ?


references :

# uname -r
2.6.16-1-xen-686                (the one from "deb
http://www.backports.org/debian/ sarge-backports main")

# cat /proc/meminfo
MemTotal:       451584 kB       that should be 16000000+ kB

# cat /proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 15
model name      : Intel(R) Xeon(R) CPU            5150  @ 2.66GHz
stepping        : 6
cpu MHz         : 2660.088
cache size      : 4096 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 10
wp              : yes
flags           : fpu tsc msr pae mce cx8 apic mtrr mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc pni
monitor ds_cpl vmx est tm2 cx16 xtpr lahf_lm
bogomips        : 5327.57

(.... 4 times : # 0 to 3)

PS : if I can't have it all by thursday, my boss'll end-up buying GSX
... =o(
BTW , is it conceivable to run ESX and/or GSX as a VMs on XEN ? (kindda
russian dolls concept)

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