PPID matches wifid PID
Wasn't able to upload files from kindle, used SCP instead as usual:
http://m.cinara.net/top.txt
At the time WiFi is broken, there are above 1050 tasks total, 1000 of them being zombie sh threads.
ifup wlan0 says interface is already configured, and wifid occasionally runs some task with ifup wlan0, writing to /var/log/udhcpc.log and doing something with the udhcpc utility.