system map mutex and zone mutex witness warning

[suresh gumpula]

Hi,
     I am seeing the following witness warning while booting on 8.1.    Is
it a known issue and
resolved in later kernels ?  Can somebody please comment on this ?

isitmychild: rmatrix mismatch between system map (index 43) and UMA zone
(index 57): w_rmatrix[43][57] == 1 but w_rmatrix[57][43] == 0
KDB: stack backtrace:
kdb_backtrace() at kdb_backtrace+0x3e
witness_line() at witness_line+0xca4
witness_line() at witness_line+0xcf9
witness_releaseok() at witness_releaseok+0x1623
witness_checkorder() at witness_checkorder+0x37e
_mtx_lock_flags() at _mtx_lock_flags+0x113
uma_zalloc_arg() at uma_zalloc_arg+0x1449
vmspace_swap_count() at vmspace_swap_count+0xc52
uma_zalloc_arg() at uma_zalloc_arg+0x10e6
uma_zalloc_arg() at uma_zalloc_arg+0x5ef
vmspace_alloc() at vmspace_alloc+0x180
vm_map_init() at vm_map_init+0xec
vm_map_insert() at vm_map_insert+0x4cb
kmem_malloc() at kmem_malloc+0x3de
zone_drain() at zone_drain+0x822
uma_large_malloc() at uma_large_malloc+0x4e
malloc() at malloc+0x251
swap_pager_swap_init() at swap_pager_swap_init+0x219
vm_pageout_oom() at vm_pageout_oom+0x952
fork_exit() at fork_exit+0x185
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff806bb61d30, rbp = 0 ---
Witness disabled.


Thanks
Suresh