Rudi Ahlers wrote:
> Ross S. W. Walker wrote:
> > Rudi Ahlers wrote:
> >
> >> Rudi Ahlers wrote:
> >>
> >>> 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@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@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?
> >>>
> >>>
> >> I also saw this:
> >>
> >> xentop - 18:04:44 Xen 3.1.0-53.1.13.el5
> >> 4 domains: 1 running, 1 blocked, 0 paused, 0 crashed, 0
> >> dying, 0 shutdown
> >> Mem: 2086396k total, 2076932k used, 9464k free CPUs: 2 @ 2666MHz
> >> NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k)
> >> MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS VBD_OO VBD_RD
> >> VBD_WR SSID
> >> Domain-0 -----r 122 1.6 713728 34.2 no
> >> limit
> >> n/a 2 4 4091 121100 0 0 0 0 0
> >> vm01 --b--- 42 0.2 262000 12.6 262144
> >> 12.6 1 1 1680 98659 0 0 0 0 0
> >>
> >>
> >>
> >> xen top shows the full RAM, but the system itself doesn't?
> >>
> >
> > That's because 'free' or 'top' in dom0 is only going to show the
> > memory allocated to dom0.
> >
> > Don't forget dom0 is a virtual machine too!
> >
> > 'xm' top will show the total memory for the system.
> >
> > I suggest removing the dom0_mem restriction in /boot/grub/menu.lst
> > if you have it, and making sure (dom0-min-mem 512) is set in
> > /etc/xen/xend-config.sxp, especially if you are using X on the
> > system. This will make sure that dom0 will always have at least
> > 512MB of mem available to it and if necessary can balloon out and
> > shrink back.
> >
<snip junk>
>
> Thanx.
>
> There was no dom0_mem restriction in /boot/grub/menu.list, but the
>
> (dom0-min-mem 256) in /etc/xen/xend-config.sxp was a bit low,
> so I adjusted it to 512, so now free -m shows quite a bit
> more RAM on the system.
>
> I have send in a request to join centos-virt@xxxxxxxxxx - but
> apparently someone needs to approve me as a list user.... I'd
> really like to get this think cracking :(
That shouldn't be, the list acts like any other CentOS list, maybe
you entered your email address incorrectly, got spam filtered, or
is just temporarily broken, but it should send you an email upon
subscribing to confirm your subscription.
Did you verify that selinux is indeed disabled by looking in
/etc/selinux/config that the line SELINUX=disabled is in there?
What was the actual contents of your domU's config file?
Also is this a workstation with Xen domU's for testing/development
or a full blown Xen server for running production VMs?
-Ross
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