This morning at 15:48 UTC, while aiming to add some dtrace probes to the buffer cache (normally a totally innocuous change so I wasn't paying very close attention), I committed a mistake that totally screwed it up -- causing bbusy to return a result indicating success even if it actually failed:
https://mail-index.NetBSD.org/source-changes/2020/02/20/msg114193.html This can kinda badly screw up file systems (primarily metadata but corruption in data too), so I recommend you update to the fix which I committed as soon as I noticed this evening at 02:04 UTC: https://mail-index.NetBSD.org/source-changes/2020/02/21/msg114202.html Sorry!
