Instability in F19 with KVM?

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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
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