On (Wed) 09 Jul 2014 [12:07:25], Jason Cooper wrote: > Amit, Kees, (snip) > I'm cooling to the idea of the init function for virtio-rng, and it > might be best just to admit that there's no way to seed the entropy pool > from the virtio-rng at probe time. After all, once userspace is up, the > system should take advantage of /dev/hwrng for the generation of > long-term keys. Either via rngd feeding /dev/random, or directly. > > As for the follow-on patch you asked about, I think that's fine. More > entropy can't hurt. > > The below patch might be worth considering so that the user of a system > with only virtio-rng can kick the entropy pool as they see fit. It's > probably not too kosher as is, but if the idea is liked, I could clean > it up and submit. > > The advantage is that users don't need to have rngd installed and > running on the system in order to jump-start the entropy pool. ... so a udev rule that looks for the new sysfs file, and asks the kernel to do its thing? And maybe even a patch to rngd that looks for this file and does a similar thing? There's also the option to use a delayed workqueue item, that will succeed if probe has finished. This method doesn't have userspace dependencies. Thanks, Amit _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
