Re: LOR vm object and stack trace

Steven G. Kargl wrote:
>>From yesterday's source, I get
> 
> 
> lock order reversal
>  1st 0xc4461000 vm object (vm object) _at_ /usr/src/sys/vm/vm_object.c:512
>  2nd 0xc082f110 system map (system map) _at_ /usr/src/sys/vm/vm_kern.c:325
> 

The same thing just happened to me, i've build kernel from todays sources.

FreeBSD flo.lan 5.1-BETA FreeBSD 5.1-BETA #12: Wed May 14 20:55:15 CEST 
2003     root_at_flo.lan:/usr/obj/usr/src/sys/FLO  i386


lock order reversal
  1st 0xc6864ab0 vm object (vm object) _at_ /usr/src/sys/vm/vm_object.c:512
  2nd 0xc082f110 system map (system map) _at_ /usr/src/sys/vm/vm_kern.c:325
Stack backtrace:
backtrace(c03fd098,c082f110,c040d41d,c040d41d,c040d2b8) at backtrace+0x17
witness_lock(c082f110,8,c040d2b8,145,0) at witness_lock+0x697
_mtx_lock_flags(c082f110,0,c040d2b8,145,3) at _mtx_lock_flags+0xb1
_vm_map_lock(c082f0b0,c040d2b8,145,e8862ab8,c0256484) at _vm_map_lock+0x36
kmem_malloc(c082f0b0,1000,101,e8862b24,c037ffa0) at kmem_malloc+0x66
page_alloc(c083a240,1000,e8862b17,101,c044ca2c) at page_alloc+0x27
slab_zalloc(c083a240,101,c040ec7c,66f,c083a924) at slab_zalloc+0x150
uma_zone_slab(c083a240,101,c040ec7c,66f,0) at uma_zone_slab+0xd8
uma_zalloc_internal(c083a240,0,101,6ef,0) at uma_zalloc_internal+0x55
uma_zfree_arg(c083a900,c68912d0,0,e8862bcc,c0367de8) at uma_zfree_arg+0x2cb
dev_pager_putfake(c68912d0,0,c040cae5,bc,c6864ab0) at dev_pager_putfake+0x3a
dev_pager_dealloc(c6864ab0,1,c040eb7f,10b,0) at dev_pager_dealloc+0xc8
vm_pager_deallocate(c6864ab0,0,c040dd55,25e,c04a7848) at 
vm_pager_deallocate+0x3d
vm_object_terminate(c6864ab0,0,c040dd55,200,c688bce4) at 
vm_object_terminate+0x1f4
vm_object_deallocate(c6864ab0,c688bce4,c6864ab0,c688bce4,e8862c9c) at 
vm_object_
deallocate+0x217
vm_map_entry_delete(c5d80900,c688bce4,c040d48b,86e,c03f8996) at 
vm_map_entry_delete+0x3b
vm_map_delete(c5d80900,288c9000,28a79000,1b0000,288c9000) at 
vm_map_delete+0x453

vm_map_remove(c5d80900,288c9000,28a79000,0,c654b068) at vm_map_remove+0x58
munmap(c5d59e40,e8862d10,c041296e,3fb,2) at munmap+0x9e
syscall(2f,2f,2f,282825a4,814a000) at syscall+0x26e
Xint0x80_syscall() at Xint0x80_syscall+0x1d
--- syscall (73), eip = 0x28444153, esp = 0xbfbff5bc, ebp = 0xbfbff5d8 ---

it happened when closing xawtv.

regards,
flo