https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276420
Bug ID: 276420
Summary: zfs panic: VERIFY(zio->io_stage ==
ZIO_STAGE_VDEV_IO_START) failed
Product: Base System
Version: 13.2-STABLE
Hardware: Any
OS: Any
Status: New
Keywords: crash
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: j...@mit.edu
I started a dd command to copy data between ZFS volumes in different pools. I
returned to find my system had rebooted. Unfortunately there was not enough
space to save a dump. All I have is the syslog message:
savecore[1921]: reboot after panic: VERIFY(zio->io_stage ==
ZIO_STAGE_VDEV_IO_START) failed
There are two such assertions in sys/contrib/openzfs/module/zfs/zio.c, one in
zio_vdev_io_bypass and the other in zio_vdev_io_reissue.
dd block size argument was bs=1m. Transfer rate was about 100 MB/s. Server
has 160 GB RAM. Source disk was SAS SSD, destination was raidz2 with 5
spinning SATA disks. Both pools have a cache on different partitions of the
same NVMe drive.
Kernel has 13.2 changes through 4c4633fdffbe8e4b6d328c2bc9bb3edacc9ab50a.
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