8.1-STABLE: problem with unmounting ZFS snapshots

[Alexander Zagrebin]

Thanks for your reply!

> > 2. the umount is waiting for disk
> > #ps | egrep 'PID|umount'
> >   PID  TT  STAT      TIME COMMAND
> >   958   0  D+     0:00,04 umount /mnt
> > # procstat -t 958
> >   PID    TID COMM             TDNAME           CPU  PRI 
> STATE   WCHAN
> >   958 100731 umount           -                  3  133 
> sleep   mntref
> 
> procstat -kk <pid>

$ ps a | grep umount
86874   2- D      0:00,06 umount /mnt
90433   3  S+     0:00,01 grep umount

$ sudo procstat -kk 86874
  PID    TID COMM             TDNAME           KSTACK
86874 100731 umount           -                mi_switch+0x176
sleepq_wait+0x42 _sleep+0x317 vfs_mount_destroy+0x5a dounmount+0x4d4
unmount+0x38b syscall+0x1cf Xfast_syscall+0xe2

-- 
Alexander Zagrebin