Re: Problem remains with FreeBSD 6.0-RELEASE as seen in RELENG_5

On Oct 29, 2005, at 11:01, Philip Kizer wrote:
> Well, it's been a few days since the last time I heard from anyone  
> that had been helping me with this and I only recall seeing one  
> diagnostic patch to apply (that does not seem to have been  
> triggered in subsequent hangs).
> Have there been any more patches I've missed that would help either  
> the problem or diagnostics?

Well, with 6.0 going production, I updated my test system to that:
	FreeBSD host6 6.0-STABLE FreeBSD 6.0-STABLE #2: Tue Nov  8 08:40:32  
CST 2005

since I figured you would do most of your development/patching  
against something more recent than RC2.


I have now had another live-lock after upgrading:

	http://www.nostrum.com/hang/hang.RELENG_6-trace-2005-11-09-0.txt

Any other suggestions or pointers on how to identify this livelock?


As an added point, during boot I did see this LOR:

Additional TCP options:.
Starting background file system checks in 60 seconds.
Tue Nov  8 15:31:14 CST 2005
FreeBSD/i386 (host6) (ttyd0)
login: lock order reversal:
1st 0xc0982be0 UMA lock (UMA lock) _at_ /usr/src/sys/vm/uma_core.c:1494
2nd 0xc1060144 system map (system map) _at_ /usr/src/sys/vm/vm_kern.c:295
KDB: stack backtrace:
kdb_backtrace(0,ffffffff,c0937670,c0937d00,c08c4344) at 0xc064d9b1 =  
kdb_backtrace+0x29
witness_checkorder(c1060144,9,c0879ac1,127) at 0xc065795c =  
witness_checkorder+0x5b0
_mtx_lock_flags(c1060144,0,c0879ac1,127) at 0xc062df1f =  
_mtx_lock_flags+0x5b
_vm_map_lock(c10600c0,c0879ac1,127) at 0xc078dda6 = _vm_map_lock+0x26
kmem_malloc(c10600c0,1000,1,e6a03ba4,c078605d) at 0xc078d432 =  
kmem_malloc+0x32
page_alloc(c104a960,1000,e6a03b97,1,c06572a0) at 0xc078647e =  
page_alloc+0x1a
slab_zalloc(c104a960,1,0,c3dd0680,c10491c8) at 0xc078605d =  
slab_zalloc+0xa1
uma_zone_slab(c104a960,1,1,10,6ecf) at 0xc07875d0 = uma_zone_slab+0xe8
uma_zalloc_bucket(c104a960,1) at 0xc07877e0 = uma_zalloc_bucket+0x12c
uma_zalloc_arg(c104a960,0,1) at 0xc078749c = uma_zalloc_arg+0x2dc
malloc(800,c08fee40,1,105,c1044460) at 0xc062c38a = malloc+0xae
hash_alloc(e6a03c74,c1044468,0,c0878d7a,1ab) at 0xc07859f9 =  
hash_alloc+0x29
zone_timeout(c1040b40) at 0xc0785912 = zone_timeout+0x7e
zone_foreach(c0785894,e6a03ce8,c0641065,0,c0785860) at 0xc0786df7 =  
zone_foreach+0x37
uma_timeout(0) at 0xc0785872 = uma_timeout+0x12
softclock(0) at 0xc0641065 = softclock+0x211
ithread_loop(c34d6c00,e6a03d38,c34d6c00,c06234c0,0) at 0xc0623604 =  
ithread_loop+0x144
fork_exit(c06234c0,c34d6c00,e6a03d38) at 0xc0622a10 = fork_exit+0xa0
fork_trampoline() at 0xc07e39fc = fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe6a03d6c, ebp = 0 ---
FreeBSD/i386 (host6) (ttyd0)
login:



Thank you,
Philip