Hi, We use mac80211_hwsim and our own 'hwsim' daemon to test conditions like poor signal strength or dropped frames. For quite a while we've noticed very poor reliability related to scanning when HWSIM_CMD_REGISTER is used to process frames. Scan results are just empty. We've put in some work arounds like only registering for tests that absolutely need it and repeatedly scanning until the expected network is found, but there are cases where this is not possible. I'm hoping for some ideas on how to actually fix this problem rather than continue trying to come up with workarounds. I have tried removing any frame processing (just an empty function) and noticed the problem still occurs, basically just calling HWSIM_CMD_REGISTER causes these problems. I will admit this seems to happen more on slower systems, like inside a virtual machine environment, or in tests which create more than just a few radios (like ~5-6+) so it does seem like mac80211_hwsim/wmediumd processing the frame is just taking too long for beacons. Thanks, James
