[Pkg-xen-devel] dom0 kernel for xen 3.2

Nikita V. Youshchenko yoush at debian.org
Thu Jan 24 19:28:09 UTC 2008


> > > Problems with what? :)
> >
> > We have a domain that runs a desktop server: about 50 Xvnc processes
> > each running a KDE desktop, with 15-20 users connected using vncviewer
> > from thin clients at patricular time.
> > Sometimes (10-20 times a day) network connection to this domain
> > freezes, and user desktops freeze for 5-30 seconds (then unfreeze).
> > This is harmless, but annoys users a lot.
> >
> > Here is example tcpdump log for such an event. Tcpdump was executed
> > inside the domain. ...
> > ...
> > In this trace, during freeze, incoming packets continue to arrive, but
> > outgoing are not sent.
> >
> > On one of other traces, I've seen that packets are still both arrived
> > and sent by the domain, but are frozen on the bridge in dom0.
> >
> > This looks like some misinteraction between netfront inside domain,
> > xen netfront<->netback transport, netback in dom0, and probably linux
> > bridge.
>
> With what xen and kernel versions does this happen (both dom0 and domU)?
> 32b or 64b?

Hardware is 2 x Dual Core AMD Opteron(tm) Processor 280.
Hypervisor, dom0 and domU are all 32 bit, debian etch with all security 
updates installed:
linux-image-2.6.18-5-xen-686: 2.6.18.dfsg.1-17
xen-hypervisor-3.0.3-1-i386-pae: 3.0.3-0-4
DomU runs physically same image as dom0.
DomU uses all 4 CPUs and 6.5 (out of 8) gigabytes of RAM.
Currently no other domUs are running on the same physical server (although 
in past they run, and in future will probably run again).
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