Re: error creating domain in xen 3.0.5

[Mark Williamson <mark.williamson@cl.cam.ac.uk>]

Hi,

Xen seems to think you don't have much memory free, even though you should do.

Please post the output of xm dmesg and xm info.

Cheers,
Mark

On Monday 30 April 2007, Itamar Reis Peixoto wrote:
> I have 2 gb of memory on this machine, and in my domU config I have set
> mem=32
>
> [root@vps auto]# pwd
> /etc/xen/auto
>
> [root@vps auto]# xm list
> Name                                      ID   Mem VCPUs      State  
> Time(s) Domain-0                                   0   256     1     r-----
>     98.9 [root@vps auto]# xm mem-set 0 32
>
> [root@vps auto]# xm list
> Name                                      ID   Mem VCPUs      State  
> Time(s) Domain-0                                   0    32     1     r-----
>    101.4
>
> [root@vps auto]# xm create ispbrasil
> Using config file "./ispbrasil".
> Error: I need 32768 KiB, but dom0_min_mem is 200704 and shrinking to 200704
> KiB would leave only -167936 KiB free. [root@vps auto]#
>
>
>
> --------------------
>
> Itamar Reis Peixoto
>
> e-mail: itamar@ispbrasil.com.br
> msn: itamarjp@starmedia.com
> skype: itamarjp
> icq: 81053601
> +55 34 3238 3845
> +55 11 4063 5033
> ----- Original Message -----
> From: "Petersson, Mats" <Mats.Petersson@amd.com>
> To: "Itamar Reis Peixoto" <itamar@ispbrasil.com.br>;
> <xen-users@lists.xensource.com> Cc: <xen-devel@lists.xensource.com>
> Sent: Monday, April 30, 2007 12:30 PM
> Subject: RE: [Xen-users] error creating domain in xen 3.0.5
>
> > -----Original Message-----
> > From: Itamar Reis Peixoto [mailto:itamar@ispbrasil.com.br]
> > Sent: 30 April 2007 15:21
> > To: Petersson, Mats; xen-users@lists.xensource.com
> > Cc: xen-devel@lists.xensource.com
> > Subject: Re: [Xen-users] error creating domain in xen 3.0.5
> >
> > I am using 3.0.5 RC4
> >
> > total_memory           : 530810
> > free_memory            : 0
>
> So, it looks like you've got 256MB given to Dom0 and abouot 512MB of RAM
> total in the machine.
>
> I think you may have problems fitting a 256MB Dom0, Xen Hypevisor and a
> 256MB guest in 512MB. Perhaps you can reduce the Dom0 memory by some
> 20-30MB and get it to fit?
>
> --
> Mats
>
> > --------------------
> >
> > Itamar Reis Peixoto
> >
> > e-mail: itamar@ispbrasil.com.br <mailto:itamar@ispbrasil.com.br>
> > msn: itamarjp@starmedia.com <mailto:itamarjp@starmedia.com>
> > skype: itamarjp
> > icq: 81053601
> > +55 34 3238 3845
> > +55 11 4063 5033
> > ----- Original Message -----
> > From: "Petersson, Mats" <Mats.Petersson@amd.com
> > <mailto:Mats.Petersson@amd.com> >
> > To: "Itamar Reis Peixoto" <itamar@ispbrasil.com.br
> > <mailto:itamar@ispbrasil.com.br> >;
> > <xen-users@lists.xensource.com
> > <mailto:xen-users@lists.xensource.com> >
> > Cc: <xen-devel@lists.xensource.com
> > <mailto:xen-devel@lists.xensource.com> >
> > Sent: Monday, April 30, 2007 11:54 AM
> > Subject: RE: [Xen-users] error creating domain in xen 3.0.5
> >
> > > -----Original Message-----
> > > From: xen-users-bounces@lists.xensource.com
> >
> > <mailto:xen-users-bounces@lists.xensource.com>
> >
> > > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of
> > > Itamar Reis Peixoto
> > > Sent: 30 April 2007 14:36
> > > To: xen-users@lists.xensource.com
> >
> > <mailto:xen-users@lists.xensource.com>
> >
> > > Cc: xen-devel@lists.xensource.com
> >
> > <mailto:xen-devel@lists.xensource.com>
> >
> > > Subject: [Xen-users] error creating domain in xen 3.0.5
> > >
> > > anyone can help-me ?
> > >
> > > I am using fedora devel (6.92)
> >
> > What version of Xen is that with?
> >
> > Daniel Berrange submitted a patch that is in 3.0.5-RC4 to fix
> > a problem
> > with auto-balloning of Dom0. That fixes a problem that is very similar
> > to yours (if not the same).
> >
> > The workaround is to assign a fixed amount of memory to Dom0 with
> > "dom0_mem=xxx" on the xen.gz boot line in your boot config file.
> >
> > <snip big log>
> >
> > > [2007-04-30 09:27:00 xend.XendDomainInfo 5143] DEBUG
> > > (XendDomainInfo:1330) XendDomainInfo.initDomain: 8 256
> > > [2007-04-30 09:27:00 xend 5143] DEBUG (balloon:133) Balloon:
> > > 0 KiB free; 0 to scrub; need 262144; retries: 20.
> > > [2007-04-30 09:27:21 xend.XendDomainInfo 5143] ERROR
> > > (XendDomainInfo:397) VM start failed
> > > Traceback (most recent call last):
> > >   File
> > > "/usr/lib/python2.5/site-packages/xen/xend/XendDomainInfo.py",
> > >  line 385, in start
> > >     self._initDomain()
> > >   File
> > > "/usr/lib/python2.5/site-packages/xen/xend/XendDomainInfo.py",
> > >  line 1375, in _initDomain
> > >     balloon.free(memory + shadow)
> > >   File
> > > "/usr/lib/python2.5/site-packages/xen/xend/balloon.py", line
> > > 170, in free
> > >     free_mem + scrub_mem + dom0_alloc - dom0_min_mem))
> > > VmError: I need 262144 KiB, but dom0_min_mem is 200704 and
> >
> > <snip another copy of same error message>
> >
> > --
> > Mats
> >
> >
> >
> > _______________________________________________
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> > http://lists.xensource.com/xen-users
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>
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-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
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