Hi Simon, First off, Happy New Year!
I compiled master ec0628c4b2a06e1fc21216091bb040d61a43b271 on OpenWrt (mips Archer C7 v2 platform Linux 4.1) a few hours ago and have experienced dnsmasq going into a tight cpu loop. Running strace showed no syscalls, so is spinning in dnsmasq somewhere. Kill -9 seemed to be the only way out, and the behaviour would return an indeterminate time after restart. Unfortunately I didn't have gdb installed on the router, dnsmasq compiled with debug, nor any experience with gdb for that matter, so it's a very limited amount of info I can offer. I tried turning off dnssec usage in case that avoided the problem, which it didn't. I'm not really sure what provokes the behaviour. However I'd been running efef497b890231ba9232d02e7bfaf8273f044622 for a week without incident, and have now backed out to d3a8b39c7df2f0debf3b5f274a1c37a9e261f94e as of a few hours ago (avoiding the arp caching) so far also without incident. So this is a pretty vague report of something lurking in very recent code. Cheers, Kevin
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