UFS (softdep) deadlock(?)

[Bjoern A. Zeeb]

Hi,

while building some packages on arm64/HEAD (this is recursively so 
don’t ask me how it got there):

..
===>  Building for libmspack-0.10.1
<hang>

I was wondering so I checked on serial console and found this:

65634  1  DN       1:15.69 mkdir mspack/.libs
65640  1  DN       1:16.12 mkdir mspack/.libs
65650  1  DN       1:15.18 mkdir mspack/.libs
65651  1  DN       1:16.31 mkdir mspack/.libs
65652  1  DN       1:15.22 mkdir mspack/.libs
65653  1  DN       1:16.11 mkdir mspack/.libs
65654  1  DN       1:15.13 mkdir mspack/.libs
65705  1  DN       1:15.04 mkdir mspack/.libs
65706  1  DN       1:15.22 mkdir mspack/.libs
65707  1  DN       1:15.87 mkdir mspack/.libs
65708  1  DN       1:15.71 mkdir mspack/.libs
65709  1  DN       1:15.64 mkdir mspack/.libs
65710  1  DN       1:16.39 mkdir mspack/.libs
65711  1  DN       1:15.65 mkdir mspack/.libs
65712  1  DN       1:14.97 mkdir mspack/.libs
65713  1  DN       1:15.04 mkdir mspack/.libs


   PID    TID COMM                TDNAME              KSTACK
65634 101149 mkdir               -                   mi_switch sleeplk 
lockmgr_xlock_hard ffs_lock vn_lock_pair softdep_prelink ufs_mkdir 
VOP_MKDIR_APV kern_mkdirat do_el0_sync handle_el0_sync
65640 101134 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65650 101099 mkdir               -                   <running>
65651 101174 mkdir               -                   <running>
65652 197951 mkdir               -                   <running>
65653 102615 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65654 101140 mkdir               -                   mi_switch sleeplk 
lockmgr_xlock_hard ffs_lock vn_lock_pair softdep_prelink ufs_mkdir 
VOP_MKDIR_APV kern_mkdirat do_el0_sync handle_el0_sync
65705 116563 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65706 117852 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65707 101101 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65708 100214 mkdir               -                   mi_switch sleeplk 
lockmgr_xlock_hard ffs_lock vn_lock_pair softdep_prelink ufs_mkdir 
VOP_MKDIR_APV kern_mkdirat do_el0_sync handle_el0_sync
65709 105512 mkdir               -                   <running>
65710 101203 mkdir               -                   mi_switch sleeplk 
lockmgr_xlock_hard ffs_lock _vn_lock lookup namei kern_mkdirat 
do_el0_sync handle_el0_sync
65711 100180 mkdir               -                   <running>
65712 100218 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync
65713 100141 mkdir               -                   mi_switch sleeplk 
lockmgr_slock_hard ffs_lock _vn_lock vget_finish cache_lookup 
vfs_cache_lookup lookup namei kern_mkdirat do_el0_sync handle_el0_sync


I’ll probably have to reboot to get out of this but I’ll let it sit 
for a few minutes in case someone has questions.


/bz