Ufs dead-locks on freebsd 6.2

Kostik Belousov kostikbel at gmail.com
Thu May 17 17:34:13 UTC 2007

On Thu, May 17, 2007 at 11:44:15AM -0400, Andrew Edwards wrote:
>  I've upgraded to 6-stable, added the kernel options as per the kernel
> handbook.  After about 5 hours of they system in a deadlock it panic'd.
> Here's the backtrace, and show pcpu, show allpcpu, show locks, show
> alllocks, show lockedvnods and alltrace.
> I will have the system down for approx another 15-20mins if there's
> anything else someone would like while I'm in the debugger.
> db> bt
> Tracing pid 46784 tid 105112 td 0xd44a8000
> kdb_enter(c0785f13) at kdb_enter+0x2b
> vfs_badlock(c0785f2c,c0786051,ccd47984) at vfs_badlock+0x47
> assert_vop_locked(ccd47984,c0786051) at assert_vop_locked+0x4a
> vop_lock_post(f9f709dc,0,1002,ccd47984,f9f709f8,...) at
> vop_lock_post+0x2a
> VOP_LOCK_APV(c07dc2e0,f9f709dc) at VOP_LOCK_APV+0xa0
> vn_lock(ccd47984,1002,d44a8000) at vn_lock+0xac
> lookup(f9f70c08) at lookup+0xde
> namei(f9f70c08) at namei+0x39a
> unp_connect(d44b2de8,d44dc380,d44a8000,d44b2de8,25,...) at
> unp_connect+0xf0
> uipc_connect(d44b2de8,d44dc380,d44a8000) at uipc_connect+0x66
> soconnect(d44b2de8,d44dc380,d44a8000) at soconnect+0x4e
> kern_connect(d44a8000,7,d44dc380,d44dc380,0,...) at kern_connect+0x74
> connect(d44a8000,f9f70d04) at connect+0x2f
> syscall(3b,805003b,bfbf003b,bfbfd920,bfbfd922,...) at syscall+0x25b
> Xint0x80_syscall() at Xint0x80_syscall+0x1f

Could you, please, do the "show vnode 0xccd47984" from ddb prompt or
"p/x *(struct vnode *)0xccd47984" from kgdb using dump for this panic ?

Side note: it seems that on HEAD, vnode_if.awk does not generate call to
vop_lock_{pre,post} due to mismatch in the name of vop and pre/post names.

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