[Bug 203906] ZFS lockup, spa_namespace_lock

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=203906

--- Comment #2 from Adrian Palmer <uwyo.apalmer at gmail.com> ---
$ procstat -kk -a 
  PID    TID COMM             TDNAME           KSTACK                       
 1252 100078 csh              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_sigsuspend+0xf4
sys_sigsuspend+0x31 amd64_syscall+0x351 Xfast_syscall+0xfb 
38986 100168 zpool            -                mi_switch+0xe1 sleepq_wait+0x3a
_sx_xlock_hard+0x48a _sx_xlock+0x5d spa_all_configs+0x6e
zfs_ioc_pool_configs+0x19 zfsdev_ioctl+0x6f0 devfs_ioctl_f+0x114
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb 
41360 101772 csh              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_sigsuspend+0xf4
sys_sigsuspend+0x31 amd64_syscall+0x351 Xfast_syscall+0xfb 
41661 100159 gdb              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_wait6+0x5f4
sys_wait4+0x72 amd64_syscall+0x351 Xfast_syscall+0xfb 
41662 101773 zpool            -                mi_switch+0xe1 sleepq_wait+0x3a
_sx_xlock_hard+0x48a _sx_xlock+0x5d spa_all_configs+0x6e
zfs_ioc_pool_configs+0x19 zfsdev_ioctl+0x6f0 devfs_ioctl_f+0x114
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb 
42143 100174 zpool            -                mi_switch+0xe1 sleepq_wait+0x3a
_sx_xlock_hard+0x48a _sx_xlock+0x5d spa_all_configs+0x6e
zfs_ioc_pool_configs+0x19 zfsdev_ioctl+0x6f0 devfs_ioctl_f+0x114
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb 
42242 101757 zfs              -                mi_switch+0xe1 sleepq_wait+0x3a
_sx_xlock_hard+0x48a _sx_xlock+0x5d spa_all_configs+0x6e
zfs_ioc_pool_configs+0x19 zfsdev_ioctl+0x6f0 devfs_ioctl_f+0x114
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb 
45485 101761 csh              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_sigsuspend+0xf4
sys_sigsuspend+0x31 amd64_syscall+0x351 Xfast_syscall+0xfb 
45553 100079 procstat         -                <running>                    
51117 101760 ls               -                mi_switch+0xe1 sleepq_wait+0x3a
_cv_wait+0x16d dbuf_read+0x45b dmu_buf_hold+0x3d zap_lockdir+0x46
zap_cursor_retrieve+0x131 zfs_freebsd_readdir+0x3e1 VOP_READDIR_APV+0xa7
kern_getdirentries+0x21c sys_getdirentries+0x28 amd64_syscall+0x351
Xfast_syscall+0xfb 
65149 101762 csh              -                mi_switch+0xe1
sleepq_catch_signals+0xab sleepq_wait_sig+0xf _cv_wait_sig+0x16a tty_wait+0x1c
ttydisc_read+0x2d4 ttydev_read+0x86 devfs_read_f+0xeb dofileread+0x95
kern_readv+0x68 sys_read+0x63 amd64_syscall+0x351 Xfast_syscall+0xfb 
65496 101767 ls               -                mi_switch+0xe1 sleepq_wait+0x3a
_cv_wait+0x16d dbuf_read+0x45b dmu_buf_hold+0x3d zap_lockdir+0x46
zap_cursor_retrieve+0x131 zfs_freebsd_readdir+0x3e1 VOP_READDIR_APV+0xa7
kern_getdirentries+0x21c sys_getdirentries+0x28 amd64_syscall+0x351
Xfast_syscall+0xfb 
65624 101755 zfs              -                mi_switch+0xe1 sleepq_wait+0x3a
_sx_xlock_hard+0x48a _sx_xlock+0x5d spa_all_configs+0x6e
zfs_ioc_pool_configs+0x19 zfsdev_ioctl+0x6f0 devfs_ioctl_f+0x114
kern_ioctl+0x255 sys_ioctl+0x13c amd64_syscall+0x351 Xfast_syscall+0xfb 


There isn't much running on the machine at this point.  I'm waiting for ZFS to
be a bit more stable.

I'll reconfigure the zpool failmode when I reboot.  It may take a while for the
problem to replicate.

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