> The diff below fixes this by setting the "source" amap lock to the newly > allocated one. This is not strictly necessary on OpenBSD since the amap > is only inserted on the global list at the end of amap copy, but this > satisfies the locking requirement of amap_wipeout() and is IMHO the > simplest solution. This has also the advantage of reducing the > differences with NetBSD.
This diff causes a reproducible hang with mount_mfs(8) on my laptop. I use an mfs noperm partition as described in https://www.openbsd.org/faq/faq5.html#Release $ tail -1 /etc/fstab swap /dest mfs rw,nosuid,noperm,-P/var/dest,-s1.5G,noauto 0 0 If I run 'top -S -s.1' on an otherwise idle system and do 'mount /dest', I see two mount_mfs(8) processes spin in fltamap and the pagedaemon is spinning in pgdaemon before the system locks up completely (this takes something between 1 and 20 seconds to happen).
