I have been using the dom0_mem parameter on the kernel for a
while. I
limit dom0 to either 1 or 2 GB of memory depending on what
the server is
doing, then I have no issues starting and domUs. Prior to
using
dom0_mem I was constantly having issues with starting
domUs.
Kirk A. Manzer
HP
TSG Solution Alliances, Linux
Phone: (281)-514-4979
Cell: (832)-563-8120
Fax: (281)-514-5802
kirk.manzer hp.com
-----Original Message-----
From: xenpreview-dev-bouncesforge.novell.com
[mailto enpre
view-dev-bouncesforge.novell.com] On Behalf Of
Jan.Albrechtbertelsmann.de
Sent: Wednesday, May 09, 2007 12:30 PM
To: jbeulichnovell.com
Cc: xenpreview-devforge.novell.com
Subject: RE: [xenpreview-dev] boot ine dom0_mem=memory
My current xmtop output does look like this:
xentop - 19:26:43 Xen 3.0.4_13138-0.23_x
5 domains: 1 running, 4 blocked, 0 paused, 0 crashed, 0
dying, 0
shutdown
Mem: 7339416k total, 7337800k used, 1616k free CPUs: 2
1866MHz
NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k)
MAXMEM(%)
VCPUS NETS NETTX(k) NETRX(k) VBDS VBD_OO
3004 --b--- 2522 1.0 1580928 21.5 1605632
21.9
1 2 0 0 4 0
3005 --b--- 24691 1.0 270208 3.7 278528
3.8
1 2 0 0 2 0
3006 --b--- 265829 1.8 1056640 14.4 1064960
14.5
1 2 0 0 3 0
3007 --b--- 8178 1.8 1056640 14.4 1064960
14.5
1 2 0 0 3 0
Domain-0 -----r 181795 11.5 3217408 43.8 no
limit n/a
2 4 2168479 840665 0 0
As you can see I've 7GB for the whole server and 3,75GB for
the domUs in
use. But xm top does only report 1616k free memory.
I've I do create an another domain on this server:
Will dom0 free some of it's mem to the new domain? If not
the dom0_mem
parameter would make sense to me.
Jan
> -----Original Message-----
> From: Jan Beulich [mailto:jbeulichnovell.com]
> Sent: Wednesday, May 09, 2007 3:10 PM
> To: Albrecht, Jan, NMI-DC
> Cc: xenpreview-devforge.novell.com
> Subject: Re: [xenpreview-dev] boot ine dom0_mem=memory
>
> >is the line
> >dom0_mem=<memory size>
> >still useful?
> >I mean I've commented out this line and dom0 does
take 3.2 GB of RAM,
> >which limits my domU a bit. If I do limit dom0 to
lets say
> 256MB, would
> >that make any difference?
>
> If you want to avoid ballooning failures, the option
may be
> useful, but as
> long as your dom0 doesn't really allocate all that
memory (so that the
> balloon driver can't grab it anymore) there should be
no
> problem omitting
> it. (256Mb for dom0 would be questionable at least -
I'd
> certainly not set it
> to this small a value.)
>
> Jan
>
>
_______________________________________________
xenpreview-dev mailing list
xenpreview-devforge.novell.com
http://forge.novell.com/mailman/listinfo/xenpreview-dev
_______________________________________________
xenpreview-dev mailing list
xenpreview-devforge.novell.com
http://forge.novell.com/mailman/listinfo/xenpreview-dev
|
