Re: When I boot two virtio-rng devices, guest will hang

[Amos Kong <akong@redhat.com>]

On Mon, Jul 28, 2014 at 02:42:13PM +0530, Amit Shah wrote:
> On (Mon) 28 Jul 2014 [16:49:20], Amos Kong wrote:
> > On Mon, Jul 28, 2014 at 01:25:14PM +0530, Amit Shah wrote:
> > > On (Mon) 28 Jul 2014 [15:32:42], Amos Kong wrote:
> > > > QEMU commandline:
> > > > 
> > > > ./x86_64-softmmu/qemu-system-x86_64 --enable-kvm   -m 2000 -drive file=/images/nolvm.qcow2 --kernel /home/devel/linux/arch/x86/boot/bzImage -append "ro root=/dev/sda1 console=ttyS0,115200"  -monitor unix:/tmp/m,nowait,server -device virtio-net-pci,netdev=h0,vectors=17,mq=on,id=n0 -netdev tap,id=h0,queues=8 -device virtio-net-pci,netdev=h1,vectors=0,mq=on,id=n1 -netdev tap,id=h1,queues=8  -vnc :0 -mon chardev=qmp,mode=control,pretty=on -chardev socket,id=qmp,host=localhost,port=1234,server,nowait -serial stdio -object rng-random,filename=/dev/urandom,id=rng0   -device virtio-rng-pci,rng=rng0,id=h0 -object rng-random,filename=/dev/urandom,id=rng1   -device virtio-rng-pci,rng=rng1,id=h1
> > > > 
> > > > It works when I only add one virtio-rng device. Did you touch this
> > > > problem?
> > > > 
> > > > I'm using latest net-next/master (ac3d2e5a9ef2f4d8f57c50070c4883ecb7cec29f)
> >  
> > Hi Amit,
> > 
> > > <snip>
> > > > [    0.223503] Non-volatile memory driver v1.3
> > > > [    1.172293] tsc: Refined TSC clocksource calibration: 2893.436 MHz
> > > > qemu: terminating on signal 2           <---------- (I have to cancel QEMU process by Ctrl + C)
> > > 
> > > This looks similar to what I saw when driver asks for randomness from the host
> > > before probe is completed.
> > > 
> > > Does the following patch help?
> > 
> > This patch was already inclued in latest net-next/master
> > patch commit: e052dbf554610e2104c5a7518c4d8374bed701bb
> 
> No, it's a different one, goes on top of the commit you referenced.
 
Thanks. This patch fixed the problem.

-- 
			Amos.