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Re: [Xen-users] error creating domain in xen 3.0.5

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] error creating domain in xen 3.0.5
From: "Itamar Reis Peixoto" <itamar@xxxxxxxxxxxxxxxx>
Date: Mon, 30 Apr 2007 12:33:28 -0200
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
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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@xxxxxxxxxxxxxxxx
msn: itamarjp@xxxxxxxxxxxxx
skype: itamarjp
icq: 81053601
+55 34 3238 3845
+55 11 4063 5033
----- Original Message -----
From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
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@xxxxxxxxxxxxxxxx]
> Sent: 30 April 2007 15:21
> To: Petersson, Mats;
xen-users@xxxxxxxxxxxxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> 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@xxxxxxxxxxxxxxxx <mailto:itamar@xxxxxxxxxxxxxxxx>
> msn:
itamarjp@xxxxxxxxxxxxx <mailto:itamarjp@xxxxxxxxxxxxx>
> skype: itamarjp
> icq: 81053601
> +55 34 3238 3845
> +55 11 4063 5033
> ----- Original Message -----
> From: "Petersson, Mats" <
Mats.Petersson@xxxxxxx
> <
mailto:Mats.Petersson@xxxxxxx> >
> To: "Itamar Reis Peixoto" <
itamar@xxxxxxxxxxxxxxxx
> <
mailto:itamar@xxxxxxxxxxxxxxxx> >;
> <
xen-users@xxxxxxxxxxxxxxxxxxx
> <
mailto:xen-users@xxxxxxxxxxxxxxxxxxx> >
> Cc: <
xen-devel@xxxxxxxxxxxxxxxxxxx
> <
mailto:xen-devel@xxxxxxxxxxxxxxxxxxx> >
> 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@xxxxxxxxxxxxxxxxxxx
> <
mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
> > Itamar Reis Peixoto
> > Sent: 30 April 2007 14:36
> > To:
xen-users@xxxxxxxxxxxxxxxxxxx
> <
mailto:xen-users@xxxxxxxxxxxxxxxxxxx>
> > Cc:
xen-devel@xxxxxxxxxxxxxxxxxxx
> <
mailto:xen-devel@xxxxxxxxxxxxxxxxxxx>
> > 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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