Re: Call for testers, vfs changes.

On Fri, 11 Mar 2005, Jeremie Le Hen wrote:

> Hi Jeff,
>
> > I have a patch at http://www.chesapeake.net/~jroberson/vgone.diff that
> > greatly simplifies the vnode teardown code, and should fix some of the
> > races that have been seen with smp vfs enabled.  I would appreciate any
> > testing people can offer.  See the thread on arch_at_ for details.
>
> I applied your patch yesterday, and I got a panic during the night.  My
> ssh session froze at about 3:02am, so I guess it's happened during daily
> periodic(8).
>
> This is hand written:
>
> %%%
>   panic: lockmgr: unknown locktype request 0

Thanks, I eventually ran into the same thing myself.  I just left a flag
off of the lockmgr call.  I'll post an updated patch later today.

Thanks,
Jeff

>   KDB: stack backtrace:
>   kdb_backtrace(c0707071,c0763000,c0705327,d50d2c0c,100) at kdb_backtrace+0x2e
>   panic(c0705327,0,c07051f4,1d2,c18fc320)
>   lockmgr(c1928164,10000,c1928188,c18fc320,d50d2c5c) at lockmgr+0x563
>   vop_stdlock(d50d2cc4,0,d50d2c94,c1928110,d50d2c7c) at vop_stdlock+0x2f
>   VOP_LOCK_APV(c074d780,d50d2cc4,c070df3b,d50d2c94,d50d2cc4) at VOP_LOCK_APV+0xbc
>   ffs_lock(d50d2cc4,c1928110,28,c1928110,d50d2ce0) at ffs_lock+0x90
>   VOP_LOCK_APV(c074d180,d50d2cc4,c070df3b,235,c18fc320)  at VOP_LOCK_APV+0xbc
>   vlrureclaim(c184e800,10,c0768ce0,c18fc320,3e8) at vlrureclaim+0x1c1
>   vnlru_proc(0,d50d2d48,c0704615,30e,0) at vnlru_proc+0x19f
>   fork_exit(c0599db0,0,d50d2d48) at fork_exit+0xc6
>   fork_trampoline() at fork_trampoline+0x8
>   --- trap 0x1, eip = 0, esp = 0xd50d2d7c, ebp = 0 ---
>   KDB: enter: panic
>   [thread pid 45 tid 100062 ]
>   Stopped at      kdb_enter+Xà30: leave
>   db> show lockedvnods
>   Locked vnodes
>
>   0xc348880: tag ufs, type VDIR
>       usecount 2, writecount 0, refcount 1 mountedhere 0
>       flags ()
>       v_object 0xc34b3ce4 ref 0 pages 1
>        lock type ufs: EXCL (count 1) by thread 0xc2056000 (pid 2137)
>           ino 34539, on dev ad0s1e
>   db> show all procs
>   [ pid 2137 is find(1) ]
> %%%
>
> A dump is available, please contact me off-list to get it.
>
> I hope this will help.  Thanks for your work.
>
> Regards,
> --
> Jeremie Le Hen
> < jeremie at le-hen dot org >< ttz at chchile dot org >
>