[Fedora-xen] Error creating domain in RHEL5 dom0_min_mem

[Deependra Shekhawat]

Hello,
I am trying to install RHEL5 beta2 as a virtual machine in RHEL5 beta2. But
all the time I get this error:
Starting install...
libvir: Xen Daemon error : GET operation failed: No such domain rhel5b2-pv1
libvir: Xen Daemon error : POST operation failed: (xend.err 'Error creating
domain: I need 262144 KiB, but dom0_min_mem is 262144 and shrinking to
262144 KiB would leave only 235124 KiB free.')
Failed to create domain rhel5b2-pv1
Traceback (most recent call last):
  File "/usr/sbin/virt-install", line 406, in ?
    main()
  File "/usr/sbin/virt-install", line 370, in main
    dom = guest.start_install(conscb)
  File "/usr/lib/python2.4/site-packages/virtinst/ParaVirtGuest.py", line
202, in start_install
    return XenGuest.XenGuest.start_install(self, consolecb)
  File "/usr/lib/python2.4/site-packages/virtinst/XenGuest.py", line 355, in
start_install
    self.domain = self.conn.createLinux(cxml, 0)
  File "/usr/lib/python2.4/site-packages/libvirt.py", line 249, in
createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed')
libvirt.libvirtError: virDomainCreateLinux() failed

Note that I have tried both GUI and command line but all the time the same
error.
Here is my grub.conf file:
title Red Hat Enterprise Linux Client (2.6.18-1.2747.el5xen)
        root (hd0,5)
        kernel /boot/xen.gz-2.6.18-1.2747.el5 dom0_mem=256M
        module /boot/vmlinuz-2.6.18-1.2747.el5xen ro root=LABEL=/ rhgb quiet
        module /boot/initrd-2.6.18-1.2747.el5xen.img

Note that I have only 512 MB RAM available.
Please help.

Regards
Deependra Shekhawat
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