Created attachment 238845 [details] core.txt.2 from this morning's crash My system has a large (1TB) external USB disk (GPT label, full disk allocated for on ZFS file system). On booting up, it can take anywhere from a few seconds to half a minute for the USB disk to come on line. When it does come on line, soon afterwards the ZFS subsystem detects it and mounts it. But rarely (although unfortunately twice in the last three days) the system crashes while mounting the disk. The attached core.txt.2 from this morning has a panic I've never seen before: VERIFY3(0 == nvlist_add_nvlist(nvl, name, val)) failed (0 == 22). The core.txt.1 file from the day before yesterday that I'll attach next is a page fault in kernel mode. Please let me know any other information needed. I've been using ZFS for almost as long it has been part of FreeBSD, but only on my main file server that is on all the time. It's only recently that I've started using it on my desktop (that gets booted up once or twice per day) or on a USB disk.
Created attachment 238846 [details] core.txt.1 from two days ago Page fault while in kernel mode.
https://bugs.freebsd.org/bugzilla/attachment.cgi?id=238886 from bug #267028 is another instance of this crash, Although all these crashes seem to be happening in ZFS code, there are no crashes when amdgpu.ko has not been loaded.
I have convinced myself not only that this is a duplicate of bug #267028 but also that neither one is a ZFS bug, but rather an amdgpu.ko bug. *** This bug has been marked as a duplicate of bug 267028 ***