RELENG_6 LOR: vnode interlock / system map

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RELENG_6 LOR: vnode interlock / system map

Joerg Pernfuss
Hi.

While hunting down the panic described in the other mail, I got an LOR
I couldn't find on the lists so far.

lock order reversal:
1st 0xc50147ec vnode interlock (vnode interlock) @ /usr/src/sys/kern/vfs_subr.c:2185
2nd 0xc1060144 system map (system map) @ /usr/src/sys/vm/vm_kern.c:295
KDB: stack backtrace:
witness_checkorder(c1060144,9,c0822173,127,e5e08a3c) at 0xc060fb1f = witness_checkorder+0x5bf
_mtx_lock_flags(c1060144,0,c0822173,127,321) at 0xc05da7d4 = _mtx_lock_flags+0x54
_vm_map_lock(c10600c0,c0822173,127,8,c106c468) at 0xc072d425 = _vm_map_lock+0x35
kmem_malloc(c10600c0,1000,101,101,8) at 0xc072c81c = kmem_malloc+0x3c
slab_zalloc(9,c08211fb,8a2,c4c93a80,c4c93af8) at 0xc0722d12 = slab_zalloc+0x82
uma_zone_slab(c106c468,8,c08211fb,8a2,0) at 0xc07231ac = uma_zone_slab+0xac
uma_zalloc_internal(1,0,0,0,e5e08b6c) at 0xc072325e = uma_zalloc_internal+0x3e
bucket_alloc(c10440a8,0,c08211fb,95e,c10440a0) at 0xc0723749 = bucket_alloc+0x29
uma_zfree_arg(c1042000,c5039208,0,e5e08b90,c06e9b38) at 0xc07248c6 = uma_zfree_arg+0x2d6
mac_labelzone_free(c5039208,c5014770,e5e08bac,c064bc3e,c5014770) at 0xc06e0710 = mac_labelzone_free+0x20
mac_destroy_vnode(c5014770,0,c0812767,2ff,c50147ec) at 0xc06e9b38 = mac_destroy_vnode+0x18
vdropl(c084cf60,e5e08bc8,c0812767,819,d64) at 0xc064bc3e = vdropl+0x11e
vput(c5014770,0,c081e644,d64,3b7) at 0xc064d6e8 = vput+0x168
handle_workitem_remove(0,c4f47400,2,32e,0) at 0xc0703c91 = handle_workitem_remove+0x161
process_worklist_item(c08dbd40,8,c081e644,2a3,437a7572) at 0xc0704181 = process_worklist_item+0x201
softdep_process_worklist(0,0,c0812767,68a,0) at 0xc0709543 = softdep_process_worklist+0x93
sched_sync(0,e5e08d38,c080693c,30d,0) at 0xc064d167 = sched_sync+0x5c7
fork_exit(c064cba0,0,e5e08d38) at 0xc05c9a34 = fork_exit+0xa4
fork_trampoline() at 0xc079152c = fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xe5e08d6c, ebp = 0 ---


Regards, Joerg.

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Re: RELENG_6 LOR: vnode interlock / system map

Bjoern A. Zeeb
On Fri, 18 Nov 2005, Joerg Pernfuss wrote:

Hi,

> While hunting down the panic described in the other mail, I got an LOR
> I couldn't find on the lists so far.
>
> lock order reversal:
> 1st 0xc50147ec vnode interlock (vnode interlock) @ /usr/src/sys/kern/vfs_subr.c:2185
> 2nd 0xc1060144 system map (system map) @ /usr/src/sys/vm/vm_kern.c:295

I added this lock order reversal with ID 172 to 'the LOR page':
        http://sources.zabbadoz.net/freebsd/lor.html#172

--
Bjoern A. Zeeb bzeeb at Zabbadoz dot NeT
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