bug#36380: service urandom-seed takes too long on boot

[Leo Famulari]

On Sun, Dec 27, 2020 at 04:00:23PM +0100, Stefan wrote:
> Qemu is invoked with these arguments concerning random:
> 
> -cpu 
> host,+smap,+rdseed,+erms,+smep,+fsgsbase,+3dnowprefetch,+rdtscp,+pdpe1gb,+rdrand,+osxsave,+xsave,+tsc-deadline,+movbe,+x2apic,+pdcm,+xtpr,+tm2,+est,+vmx,+ds_cpl,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme
>  -object rng-random,id=objrng0,filename=/dev/random -device 
> virtio-rng-pci,rng=objrng0,id=rng0,bus=pci.0,addr=0x1c

What does the argument "filename=/dev/random" do? Does it use the host's
/dev/random to provide entropy to the QEMU guest?