Jaromír Dole?ek <jaromir.dole...@gmail.com> wrote: > This is always a bug, driver processes same buf twice. It can do harm. > If the buf is reused for some other I/O, system can fail to store > data, or claim to read data when it didn't.
I can reproduce the crash at will: running at the same time the two following commands reliabily trigger "panic biodone2 already" /sbin/dump -a0f /dev/null / sh /etc/daily That crash on NetBSD-8.0 domU, either i386 or amd64. At mine the only machines that managed to spare the bug so far were the one where the dump is finished when /etc/daily starts. All the other one keep rebooting at least once a day. -- Emmanuel Dreyfus http://hcpnet.free.fr/pubz m...@netbsd.org
