[CentOS] error creating Centos 5.1 x32 dum_U instance on CentOS5.1 x64

Fri Feb 29 16:03:51 UTC 2008
Rudi Ahlers <Rudi at SoftDux.com>

Ross S. W. Walker wrote:
>
> Nah, RHEL 5.1+ supports 32-bit domU (PAE and non PAE) on 64-bit dom0.
>
> Actually RHEL Xen is 3.1 with the brain damaged 3.0 userland utilities.
>
> -Ross
>
>
> ----- Original Message -----
>
I've run into an interesting problem, which trying to install a 64bit guest:


libvir: Xen Daemon error : POST operation failed: (xend.err 'Error 
creating domain: I need 524288 KiB, but dom0_min_mem is 262144 and 
shrinking to 262144 KiB would leave only 461040 KiB free.')
Traceback (most recent call last):
  File "/usr/sbin/virt-install", line 633, in ?
    main()
  File "/usr/sbin/virt-install", line 578, in main
    dom = guest.start_install(conscb,progresscb)
  File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 649, 
in start_install
    return self._do_install(consolecb, meter)
  File "/usr/lib/python2.4/site-packages/virtinst/Guest.py", line 666, 
in _do_install
    self.domain = self.conn.createLinux(install_xml, 0)
  File "/usr/lib64/python2.4/site-packages/libvirt.py", line 503, in 
createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', 
conn=self)
libvirt.libvirtError: virDomainCreateLinux() failed POST operation 
failed: (xend.err 'Error creating domain: I need 524288 KiB, but 
dom0_min_mem is 262144 and shrinking to 262144 KiB would leave only 
461040 KiB free.')


[root at gimbli ~]# uname -a
Linux gimbli 2.6.18-53.1.13.el5xen #1 SMP Tue Feb 12 13:33:07 EST 2008 
x86_64 x86_64 x86_64 GNU/Linux
[root at gimbli ~]# cat /proc/meminfo
MemTotal:       713728 kB
MemFree:        503028 kB
Buffers:         25284 kB
Cached:          69356 kB
SwapCached:          0 kB
Active:          67144 kB
Inactive:        55820 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       713728 kB
LowFree:        503028 kB
SwapTotal:     2096472 kB
SwapFree:      2096472 kB
Dirty:              40 kB
Writeback:           0 kB
AnonPages:       28280 kB
Mapped:           7584 kB
Slab:            17004 kB
PageTables:       2316 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   2453336 kB
Committed_AS:   145988 kB
VmallocTotal: 34359738367 kB
VmallocUsed:      2204 kB
VmallocChunk: 34359735799 kB


Even though Linux reports only 713MB RAM, the machine has 2GB RAM. How / 
where do I fix this?

-- 

Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
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