Re: [Xen-users] Memory squeeze in netback driver?

[Jason Dillon <jason@xxxxxxxxxxxx>]

Is there any rule for how much memory dom0_mem should be set to?   
I've got 16g in this machine, and run ~12 1g domU's.
Is more memory for dom0_mem better?  or is less better?

--jason


On May 3, 2007, at 8:14 AM, Adam Jacob wrote:

> On Thu, May 03, 2007 at 03:03:43AM -0700, Jason Dillon wrote:
> > I've been running into this from time to time... usually when xm
> > creating a new domU, /var/log/messages for dom0 spits out:
> >
> > <snip>
> > May  3 02:56:04 tweak kernel: printk: 4 messages suppressed.
> > May  3 02:56:04 tweak kernel: xen_net: Memory squeeze in netback  
> > driver.
> > </snip>
> >
> > And at this point all of the network connectivity for *all* domU's
> > controlled for that dom0 vanish.  I have to xm shutdown and xm create
> > them again to get the network back.  This doesn't happen all of the
> > time, seems rather random really.
> >
> > Its *really* annoying.  Is there a way to prevent this from  
> > happening?
> You need to set the dom0_mem parameter at boot time.  Something like:
>
> kernel          /xen-3.0.3-1-amd64.gz dom0_mem=256M
>
> Has been working for us.
>
> Adam
>
> --
> HJK Solutions - We Launch Startups - http://www.hjksolutions.com
> Adam Jacob, Senior Partner
> T: (206) 508-4759 E: adam@xxxxxxxxxxxxxxxx

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