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Date:      Mon, 13 Jul 2009 17:40:46 -0700
From:      Xin LI <delphij@delphij.net>
To:        freebsd-net@freebsd.org
Cc:        "Bjoern A. Zeeb" <bz@FreeBSD.org>
Subject:   [LOR] carp vs bridge
Message-ID:  <4A5BD40E.9080108@delphij.net>

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Hi,

This LOR is observed in an environment with both CARP and bridge set up.
 Is this an known one?

lock order reversal:

 1st 0xffffff00033253e0 carp_if (carp_if) @
/usr/src/sys/netinet/ip_carp.c:1326
 2nd 0xffffff00031d1218 if_bridge (if_bridge) @
/usr/src/sys/net/if_bridge.c:1850
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x2e
witness_checkorder() at witness_checkorder+0x81e
_mtx_lock_flags() at _mtx_lock_flags+0x78
bridge_output() at bridge_output+0x67
ether_output() at ether_output+0x3d7
ip_output() at ip_output+0xd12
carp_send_ad_locked() at carp_send_ad_locked+0x54b
carp_master_down_locked() at carp_master_down_locked+0x79
carp_master_down() at carp_master_down+0x33
softclock() at softclock+0x291
intr_event_execute_handlers() at intr_event_execute_handlers+0x68
ithread_loop() at ithread_loop+0xb2
fork_exit() at fork_exit+0x12a
fork_trampoline() at fork_trampoline+0xe
- --- trap 0, rip = 0, rsp = 0xffffff8000042d30, rbp = 0 ---

Cheers,
- --
Xin LI <delphij@delphij.net>	http://www.delphij.net/
FreeBSD - The Power to Serve!
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