On Fri, May 03, 2019 at 04:49:05PM +0100, Daniel P. Berrangé wrote: > On Fri, May 03, 2019 at 05:46:13PM +0200, Kashyap Chamarthy wrote: > > When QEMU exposes a VirtIO-RNG device to the guest, that device needs a > > source of entropy, and that source needs to be "non-blocking", like > > `/dev/urandom`. However, currently QEMU defaults to the problematic > > `/dev/random`, which is "blocking" (as in, it waits until sufficient > > entropy is available). > > > > So change the entropy source to the recommended `/dev/urandom`. > > > > Related discussion in these[1][2] past threads. > > > > [1] https://lists.nongnu.org/archive/html/qemu-devel/2018-06/msg08335.html > > -- "RNG: Any reason QEMU doesn't default to `/dev/urandom`?" > > [2] https://lists.nongnu.org/archive/html/qemu-devel/2018-09/msg02724.html > > -- "[RFC] Virtio RNG: Consider changing the default entropy source to > > /dev/urandom" > > > > Signed-off-by: Kashyap Chamarthy <kcham...@redhat.com> > > --- > > backends/rng-random.c | 2 +- > > qemu-options.hx | 2 +- > > 2 files changed, 2 insertions(+), 2 deletions(-) > > Reviewed-by: Daniel P. Berrangé <berra...@redhat.com>
I'm wondering if this needs to be mentioned on a Release Notes wiki somewhere -- because we're changing the default. -- /kashyap
