Re: [Xen-users] dynamic memory extension not working on Debian Squeeze

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2012-11-14 at 10:46 +0000, Peter Viskup wrote:
> On 11/14/2012 11:39 AM, Ian Campbell wrote:
> > On Wed, 2012-11-14 at 10:35 +0000, Peter Viskup wrote:
> > [...]
> >> server1:~# xenstore-ls -fp | grep target
> >> <this command is hanging>
> > [...]
> >> xenfs is not mounted on dom0 - could it be the reason of this issues?
> > Could be, I'm surprised you were able to start a domain at all without
> > it though.
> >
> > Also if xenstore is hanging then there is something else majorly wrong
> > too. Probably best to remedy both of those first.
> >
> > Mounting xenfs might be enough to kick things back to life but otherwise
> > you may need to reboot the host.
> >
> > Ian.
> Sorry I was wrong - xenfs mounted on dom0 and also on domU.
> Server rebooted last night (6-7 hours before) - no additional 
> installation tasks were performed.
> These are xen-related packages installed:
> 
> ii  xen-tools                                               
> 4.2-1                        Tools to manage Xen virtual servers
> ii  xen-utils-4.0                                           
> 4.0.1-5.4                    XEN administrative tools
> ii  xen-utils-common                                        
> 4.0.0-1                      XEN administrative tools - common files
> ii  xen-hypervisor-4.0-amd64                                
> 4.0.1-5.4                    The Xen Hypervisor on AMD64
> ii  linux-image-2.6.26-2-xen-amd64                          
> 2.6.26-27                    Linux 2.6.26 image on AMD64, oldstyle Xen 
> support
> ii  linux-image-2.6.32-5-xen-amd64                          
> 2.6.32-46                    Linux 2.6.32 for 64-bit PCs, Xen dom0 support

What version of xenstore-utils do you have installed?

> memory  = '256'
> memmax  = '4092'
[...]

This is good, it *should* mean you can balloon up to 4G.

> Command xenstore-ls still hanging.

Are you running this in dom0 or domU? You should run it in dom0.

If the xenstore tools don't work in dom0 then there is a pretty big
problem. You could try strace'ing the client and/or daemon I suppose?

One not uncommon problem with the C xenstored is a corrupted DB, so
removing /var/run/xenstored/tdb and rebooting might help. In general
removing this on boot (before starting the daemon) is a good idea, not
sure if the Debian scripts do this for you.

Ian.


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