LOR

Hi,

current dated of 2004-04-28, during kernel compilation:

lock order reversal
  1st 0xc1ab0210 vm object (vm object) _at_ /usr/src/sys/vm/swap_pager.c:1313
  2nd 0xc08bfc00 swap_pager swhash (swap_pager swhash) _at_ 
/usr/src/sys/vm/swap_pager.c:1803
  3rd 0xc103f8c4 vm object (vm object) _at_ /usr/src/sys/vm/uma_core.c:886
Stack backtrace:
backtrace(0,1,c088e558,c088f6d8,c081d81c) at backtrace+0x12
witness_checkorder(c103f8c4,9,c07dbe06,376) at witness_checkorder+0x593
_mtx_lock_flags(c103f8c4,0,c07dbe06,376,c19e0a94) at _mtx_lock_flags+0x67
obj_alloc(c19e0a80,1000,c4842a2f,101,c19e0a94) at obj_alloc+0x31
slab_zalloc(c19e0a80,1,c19e0a80,c19e0a94,1) at slab_zalloc+0x82
uma_zone_slab(c19e0a80,1,c19e0a94,0,c07dbe06,68f) at uma_zone_slab+0xb5
uma_zalloc_internal(c19e0a80,0,1,c19e0a94,0) at uma_zalloc_internal+0x28
uma_zalloc_arg(c19e0a80,0,1) at uma_zalloc_arg+0x2f8
swp_pager_meta_build(c1ab0210,5,0,2,0) at swp_pager_meta_build+0x108
swap_pager_putpages(c1ab0210,c4842c00,4,0,c4842b70) at 
swap_pager_putpages+0x2b4
default_pager_putpages(c1ab0210,c4842c00,4,0,c4842b70) at 
default_pager_putpages+0x18
vm_pageout_flush(c4842c00,4,0,0,c4842bdc) at vm_pageout_flush+0x11e
vm_pageout_clean(c10cced8) at vm_pageout_clean+0x2a5
vm_pageout_scan(0) at vm_pageout_scan+0x54b
vm_pageout(0,c4842d48,0,c0724df4,0) at vm_pageout+0x2d2
fork_exit(c0724df4,0,c4842d48) at fork_exit+0xa8
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xc4842d7c, ebp = 0 ---

bye,
-- 
------------------------------- ----------------------------------
Michael Bretterklieber          - http://www.bretterklieber.com
A-Quadrat Automation GmbH       - http://www.a-quadrat.at
Tel: ++43-(0)3172-41679         - GSM: ++43-(0)699 12861847
------------------------------- ----------------------------------
"...the number of UNIX installations has grown to 10, with more 
expected..." - Dennis Ritchie and Ken Thompson, June 1972