[Bug 229007] [zfs] kernel crashes on remove disk

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Thu Jun 14 11:42:44 UTC 2018


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229007

--- Comment #1 from Sergei Masharov <serzh at expir.org> ---
also crashes on files:

root@:/ # mount -t tmpfs tmpfs /tmp
root@:/ # dd if=/dev/zero of=/tmp/z1 bs=1G count=0 seek=1
0+0 records in
0+0 records out
0 bytes transferred in 0.000010 secs (0 bytes/sec)
root@:/ # dd if=/dev/zero of=/tmp/z2 bs=1G count=0 seek=1
0+0 records in
0+0 records out
0 bytes transferred in 0.000010 secs (0 bytes/sec)
root@:/ # zpool create zm /tmp/z1
root@:/ # zpool add zm /tmp/z2
root@:/ # zpool list -v zm
NAME         SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP  HEALTH
 ALTROOT
zm          1.88G   154K  1.87G        -         -     0%     0%  1.00x  ONLINE
 -
  /tmp/z1    960M   145K   960M        -         -     0%     0%
  /tmp/z2    960M  8.50K   960M        -         -     0%     0%
root@:/ # zpool remove zm /tmp/z1
root@:/ # zpool list -v zm
NAME           SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP 
HEALTH  ALTROOT
zm             960M   176K   960M        -         -     0%     0%  1.00x 
ONLINE  -
  /tmp/z2      960M   176K   960M        -         -     0%     0%
root@:/ # dd if=/dev/zero of=/tmp/z0 bs=1M count=0 seek=100
0+0 records in
0+0 records out
0 bytes transferred in 0.000010 secs (0 bytes/sec)
root@:/ # zpool add zm /tmp/z0
root@:/ # zpool list -v zm
NAME           SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP 
HEALTH  ALTROOT
zm            1.02G   138K  1.02G        -         -     0%     0%  1.00x 
ONLINE  -
  /tmp/z2      960M   138K   960M        -         -     0%     0%
  /tmp/z0       80M      0    80M        -         -     0%     0%
root@:/ # zpool remove zm /tmp/z2
cannot remove /tmp/z2: out of space
root@:/ # zpool remove zm /tmp/z2
cannot remove /tmp/z2: out of space
root@:/ # zpool remove zm /tmp/z2
cannot remove /tmp/z2: out of space
root@:/ # zpool add zm /tmp/z1
root@:/ # zpool remove zm /tmp/z2

and system crashes

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