Instability in F19 with KVM?

[Martin Jackson]

Hello,

I seem to be having stability problems with F19 as of kernel 3.9.8-301.  
The problems have persisted in 3.9.9 and in the 3.10 kernel I tried from 
the bleeding edge repo.

The symptom is that the system, and and VMs it's running (I have KVM 
running, with VLANs and traditional bridges) will simply hang - become 
unresponsive.  No response to network traffic, no response to 
keyboard/mouse input, and the system has to be hard rebooted.  There are 
two network cards in the system, the build-in Intel and an add-on cheapo 
r8169 that *might* be the problem.

abrt does not detect the problem and there is nothing in syslog. 
Typically the system will run around 36 hours before hanging.  There is 
multicast, as I have routers (they are VMs running quagga and keepalived).

I'm not sure what to look at.  I kinda suspect the change to r8169 that 
went into 3.9.8, but it's hard to be sure.  Anyone see something 
similar?  Is there something helpful I could post?

Thanks,
Marty