Re: [Xen-users] Xen and it's future with linux?

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sun, Mar 14, 2010 at 01:37:46AM -0800, Brandon Lamb wrote:
> On Sun, Mar 14, 2010 at 1:15 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > On Sat, Mar 13, 2010 at 12:19:46PM -0800, khris4 wrote:
> >>
> >> Thanx everyone for your help, I worked with ubunutu a little more last 
> >> night
> >> and was able to see the new kernel support for  pv_op. I was confused
> >> because there were  so many article out on the web using my friend google
> >> but it starts getting confusing because there's a lot of  outdated
> >> howto,articles, blog that are not in chronological order to understand were
> >> we are  with xen today. Does anyone know if there is site that keeps up 
> >> with
> >> xen? There even some pages on xen.org that  are out dated and kinda hard to
> >> figure out what is what. Also I would love to help out on keeping xen
> >> documents update, so it will be a little easier find what we are looking
> >> for. If know how I can help out on this, that would be helpful.
> >>
> >
> > Some Xen wiki documents that have been written or updated recently:
> >
> > http://wiki.xensource.com/xenwiki/XenBestPractices
> > http://wiki.xensource.com/xenwiki/XenCommonProblems
> > http://wiki.xensource.com/xenwiki/XenUSBPassthrough
> > http://wiki.xensource.com/xenwiki/XenVGAPassthrough
> > http://wiki.xensource.com/xenwiki/XenConfigurationFileOptions
> > http://wiki.xensource.com/xenwiki/XenHypervisorBootOptions
> >
> > http://wiki.xensource.com/xenwiki/XenDom0Kernels
> > http://wiki.xensource.com/xenwiki/XenParavirtOps
> >
> > This one (XenFaq) has a lot of (too) old information:
> > http://wiki.xensource.com/xenwiki/XenFaq
> >
> > Feel free to create your own wiki account and then ask Stephen Spector
> > to give you edit permissions, and you're ready to contribute!
> >
> > -- Pasi
> >
> >>
> >> christopher andrews-4 wrote:
> >> >
> >> >
> >> > Hello Everyone
> >> > I was wondering if any has any information on what going with xen. I have
> >> > notice that many linux distro have start removing linux dom0 and domU's
> >> > support like ubunutu. I'm kinda worried on what the future is going to
> >> > hold for xen. Also is there any way to get ubuntu 9.10 supported has a
> >> > domU without using HVM because performance reasons?
> >> > _______________________________________________
> >> > Xen-users mailing list
> >> > Xen-users@xxxxxxxxxxxxxxxxxxx
> >> > http://lists.xensource.com/xen-users
> >> >
> >>
> >> --
> >> View this message in context: 
> >> http://old.nabble.com/Xen-and-it%27s-future-with-linux--tp27885493p27890016.html
> >> Sent from the Xen - User mailing list archive at Nabble.com.
> 
> 
> Oh weird!! I think I may have just figured out what it was, so
> dom0_mem=512M in grub, and dom0-min-mem=512 in xend-config, balloon on
> or off didnt seem to matter, but anyway...
> 
> On a fresh reboot domain-0 would be using ALL the memory except for
> like 130 megs or so out of 4 gigs. So every time i tried to start a
> guest it would complain about not enough memory. I thought maybe it
> was suppose to take memory away from its "pool" of used memory or
> something and use for the guest.
> 
> So, I just rebooted again keeping dom0_mem=512M and set balloon to no
> and dom0-min-mem=192 and then "xm mem-set Domain-0 512" and I can see
> my available memory go up to 3 gigs where it should be.
> 
> Any reason why it would start off sucking up all the ram? Am I doing
> something wrong? Is there a way to say on a reboot give domain-0 512
> megs of ram and thats it? I would have thought that by turning
> ballooning OFF that this would be the effect but apparently not?
> 

xen.gz dom0_mem= parameter specifies the _initial_ amount of memory dom0 has on 
boot.
If you don't specify it, then dom0 will use all the available memory leaving 0 
MB free 
in Xen hypervisor for other guests.

dom0-min-mem=192 in xend-config.sxp means dom0 will not be ballooned below
192 of memory.

Disabling dom0 ballooning obviously completely disables dom0 ballooning,
and dom0 will have the initial boot time amount of memory forever.

-- Pasi


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