solaris assert: t == ZIO_TYPE_READ || t == ZIO_TYPE_WRITE, file: ...zfs/vdev_queue.c, line: 302

[Kristof Provost]

Hi,

Booting CURRENT (r286582) earlier I saw the following panic:
panic: solaris assert: t == ZIO_TYPE_READ || t == ZIO_TYPE_WRITE, file: /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c, line: 302
cpuid = 1
Uptime: 41s

...
(kgdb) #0  doadump (textdump=1) at pcpu.h:221
#1  0xffffffff80a19e65 in kern_reboot (howto=260)
    at /usr/src/sys/kern/kern_shutdown.c:329
#2  0xffffffff80a1a458 in vpanic (fmt=<value optimized out>,
    ap=<value optimized out>) at /usr/src/sys/kern/kern_shutdown.c:626
#3  0xffffffff80a1a4a3 in panic (fmt=0x0)
    at /usr/src/sys/kern/kern_shutdown.c:557
#4  0xffffffff8242622a in assfail (a=<value optimized out>,
    f=<value optimized out>, l=<value optimized out>)
    at /usr/src/sys/cddl/compat/opensolaris/kern/opensolaris_cmn_err.c:81
#5  0xffffffff8213f8be in vdev_queue_io (zio=0xfffff8000ede1000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_queue.c:302
#6  0xffffffff82163406 in zio_vdev_io_start (zio=0xfffff8000ede1000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:2774
#7  0xffffffff8215eaa9 in zio_execute (zio=0xfffff8000ede1000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1496
#8  0xffffffff8215de5b in zio_nowait (zio=0xfffff8000ede1000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c:1550
#9  0xffffffff8219f23c in trim_map_commit (spa=0xfffffe00032b7000,
    zio=0xfffff8000eda6760, vd=0xfffff8000e7dd800)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/trim_map.c:476
#10 0xffffffff8219f046 in trim_map_commit (spa=0xfffffe00032b7000,
    zio=0xfffff8000eda6760, vd=0xfffff8000e9b4800)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/trim_map.c:532
#11 0xffffffff8219f046 in trim_map_commit (spa=0xfffffe00032b7000,
    zio=0xfffff8000eda6760, vd=0xfffff8000e9b4000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/trim_map.c:532
#12 0xffffffff8219ed9f in trim_thread (arg=0xfffffe00032b7000)
    at /usr/src/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/trim_map.c:579
#13 0xffffffff809e0374 in fork_exit (
    callout=0xffffffff8219ecb0 <trim_thread>, arg=0xfffffe00032b7000,
    frame=0xfffffe0239c09c00) at /usr/src/sys/kern/kern_fork.c:1006
#14 0xffffffff80e5e7ae in fork_trampoline ()
    at /usr/src/sys/amd64/amd64/exception.S:610
#15 0x0000000000000000 in ?? ()

This is a regular amd64 machine with 4 disks in raidz. I'd pulled one drive and
replaced it with an empty one. It's possible that's related to the panic.

Regards,
Kristof