[Bug 201859] Kernel panic after every reboot (ZFS)

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri Jul 24 19:29:58 UTC 2015


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201859

            Bug ID: 201859
           Summary: Kernel panic after every reboot (ZFS)
           Product: Base System
           Version: 10.1-STABLE
          Hardware: i386
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: misc
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: licho at protonmail.ch

After every reboot of my EeePC i see kernel panic when FreeBSD tries to mount
root filesystem (ZFS). Only booting from live cd and typing "zpool import -fR
/mnt root && zpool export root" fixes this issue, but it's repeating on every
reboot and many (not all) shutdowns.

Shutdown procedure didn't show any errors on console, so I'm thinking that disk
could be not fully synced before powering off.

I have ZFS on whole diks, configuration below.

--------------------------------------------------------------------------------

└──> gpart show ada0
=>      34  31522109  ada0  GPT  (15G)
        34      1024     1  freebsd-boot  (512K)
      1058  31456256     2  freebsd-zfs  (15G)
  31457314     64829        - free -  (32M)

--------------------------------------------------------------------------------

└──> zpool status root
  pool: root
 state: ONLINE
  scan: none requested
config:

        NAME           STATE     READ WRITE CKSUM
        root           ONLINE       0     0     0
          gpt/freebsd  ONLINE       0     0     0

errors: No known data errors

--------------------------------------------------------------------------------

└──> zpool get all root
NAME  PROPERTY                       VALUE                          SOURCE
root  size                           14.9G                          -
root  capacity                       39%                            -
root  altroot                        -                              default
root  health                         ONLINE                         -
root  guid                           16556967936092608241           default
root  version                        -                              default
root  bootfs                         root                           local
root  delegation                     on                             default
root  autoreplace                    off                            default
root  cachefile                      -                              default
root  failmode                       wait                           default
root  listsnapshots                  off                            default
root  autoexpand                     on                             local
root  dedupditto                     0                              default
root  dedupratio                     1.00x                          -
root  free                           9.05G                          -
root  allocated                      5.82G                          -
root  readonly                       off                            -
root  comment                        -                              default
root  expandsize                     0                              -
root  freeing                        0                              default
root  fragmentation                  21%                            -
root  leaked                         0                              default
root  feature at async_destroy          enabled                        local
root  feature at empty_bpobj            active                         local
root  feature at lz4_compress           active                         local
root  feature at multi_vdev_crash_dump  enabled                        local
root  feature at spacemap_histogram     active                         local
root  feature at enabled_txg            active                         local
root  feature at hole_birth             active                         local
root  feature at extensible_dataset     enabled                        local
root  feature at embedded_data          active                         local
root  feature at bookmarks              enabled                        local
root  feature at filesystem_limits      enabled                        local

--------------------------------------------------------------------------------

└──> zfs get all root
NAME  PROPERTY              VALUE                  SOURCE
root  type                  filesystem             -
root  creation              Thu Jul 23  1:27 2015  -
root  used                  7.88G                  -
root  available             6.53G                  -
root  referenced            179M                   -
root  compressratio         1.94x                  -
root  mounted               yes                    -
root  quota                 none                   default
root  reservation           none                   default
root  recordsize            128K                   default
root  mountpoint            /                      local
root  sharenfs              off                    default
root  checksum              sha256                 local
root  compression           lz4                    local
root  atime                 off                    local
root  devices               on                     default
root  exec                  on                     default
root  setuid                on                     default
root  readonly              off                    default
root  jailed                off                    default
root  snapdir               visible                local
root  aclmode               discard                default
root  aclinherit            restricted             default
root  canmount              on                     default
root  xattr                 off                    temporary
root  copies                1                      default
root  version               5                      -
root  utf8only              on                     -
root  normalization         none                   -
root  casesensitivity       sensitive              -
root  vscan                 off                    default
root  nbmand                off                    default
root  sharesmb              off                    default
root  refquota              none                   default
root  refreservation        none                   default
root  primarycache          all                    default
root  secondarycache        all                    default
root  usedbysnapshots       0                      -
root  usedbydataset         179M                   -
root  usedbychildren        7.71G                  -
root  usedbyrefreservation  0                      -
root  logbias               latency                default
root  dedup                 off                    default
root  mlslabel                                     -
root  sync                  standard               default
root  refcompressratio      1.71x                  -
root  written               179M                   -
root  logicalused           11.2G                  -
root  logicalreferenced     307M                   -
root  volmode               default                default
root  filesystem_limit      none                   default
root  snapshot_limit        none                   default
root  filesystem_count      none                   default
root  snapshot_count        none                   default
root  redundant_metadata    all                    default

--------------------------------------------------------------------------------

└──> cat /boot/loader.conf 
#Bootloader
beastie_disable="YES"
autoboot_delay=-1


#Modules
zfs_load="YES"
aio_load="YES"
i915kms_load="YES"


#Kernel memory
vm.kmem_size=512M
vm.kmem_size_min=512M
vm.kmem_size_max=512M


#ZFS
vfs.zfs.recover=1
vfs.zfs.check_hostid=0

vfs.zfs.zio.use_uma=1
vfs.zfs.prefetch_disable=1

vfs.zfs.arc_min=256M
vfs.zfs.arc_max=256M
vfs.zfs.vdev.cache.size=5M


#Display
kern.vty=vt


#HW tunables
hw.pci.do_power_nodriver=1
hw.psm.synaptics_support=1
kern.timecounter.hardware=TSC
drm.i915.enable_rc6=7


#Limits
kern.maxfiles=65536
kern.ipc.maxsockets=65536


#Shared memory
kern.ipc.shmseg=4096
kern.ipc.shmmni=4096

--------------------------------------------------------------------------------

And obviously zfs_enable="YES" in /etc/rc.conf.

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