[Bug 278958] zfs panic: page fault in sync_dnodes_task

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278958

--- Comment #3 from nunziotocci2000@gmail.com ---
There was another crash yesterday, this time with a different backtrace:
#0  __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1  doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:405
#2  0xffffffff80b42d37 in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:526
#3  0xffffffff80b4320f in vpanic (fmt=0xffffffff81136b3b "%s",
ap=ap@entry=0xfffffe0231e84ca0)
    at /usr/src/sys/kern/kern_shutdown.c:970
#4  0xffffffff80b43063 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:894
#5  0xffffffff8100c85c in trap_fatal (frame=0xfffffe0231e84d90, eva=164) at
/usr/src/sys/amd64/amd64/trap.c:952
#6  0xffffffff8100c8af in trap_pfault (frame=0xfffffe0231e84d90,
usermode=false, signo=<optimized out>,
    ucode=<optimized out>) at /usr/src/sys/amd64/amd64/trap.c:760
#7  <signal handler called>
#8  taskqueue_run_locked (queue=0x0, queue@entry=0xfffff800021dd100) at
/usr/src/sys/kern/subr_taskqueue.c:514
#9  0xffffffff80ba6c22 in taskqueue_thread_loop
(arg=arg@entry=0xfffff800020b30e0)
    at /usr/src/sys/kern/subr_taskqueue.c:824
#10 0xffffffff80afdb7f in fork_exit (callout=0xffffffff80ba6b60
<taskqueue_thread_loop>, arg=0xfffff800020b30e0,
    frame=0xfffffe0231e84f40) at /usr/src/sys/kern/kern_fork.c:1160
#11 <signal handler called>

I found a thread on TrueNAS:
https://www.truenas.com/community/threads/importing-pool-crashes-os.45049/

This seems to indicate an SSD failure. We are going to remove the suspect drive
from the mirror and see if the crashes stop. If we don't get any after a week
then I will close this bug as a hardware issue.

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