> Date: Fri, 25 Jan 2013 21:25:32 +0100 (CET) > From: Stefan Fritsch <[email protected]> > > Hi, > > qemu 1.3 has added a virtio entropy device. Here is a driver for it. > Comments? OKs? > > As the entropy reserve of the host may not be unlimited, the OpenBSD guest > should only ask for entropy when it actually needs it.
If qemu really allows the guest to consume the complete entropy reserve of the host then that's a bug in qemu and/or the host OS. > Would it make sense to add an API that allows a driver to determine > how full the entropy queue is? This could also be used by some > hardware drivers to avoid polling for entropy if not > necessary. E.g. amdpm does the polling in every timer tick, which is > wasteful. Wasteful in what sense? I doubt that reading the hardware registers once every 10ms noticibly affects performance of the system.
