Date: Tue, 27 May 1997 14:12:56 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Bob Bishop <rb@gid.co.uk> Cc: Karl Denninger <karl@Mcs.Net>, current@freebsd.org Subject: Re: Boom! :-) Message-ID: <Pine.BSF.3.95q.970527141015.349C-100000@herring.nlsystems.com> In-Reply-To: <l03020910afb05a09eb52@[194.32.164.2]>
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On Tue, 27 May 1997, Bob Bishop wrote:
> At 0:24 +0100 27/5/97, Karl Denninger wrote:
> >On Mon, May 26, 1997 at 07:58:28PM +0100, Bob Bishop wrote:
> >>[...]
> >> If, as I suspect, 0x8:0xf01119b0 = _lockstatus + 0x8, this is a
> >> particularly bad case of kern/3581.
> >>[...]
> >Hmmm... Don't think so... this looks to be in lockinit...
>
> Sure does. Congratulations! Looks like you've found another semi-repeatable
> way to summon up the lock gremlins! :-) :-) :-{
>
> Seriously folks, the size of this club (people who regularly fall down
> various lock-related holes) seems to be growing. I have a little time to
> spare at the moment but I'm not up to speed with this stuff, and I have to
> say it looks unpleasant.
This is a workaround for the lockstatus panic. A better fix will probably
have to wait until Peter is finished with poll(2).
Index: ufs_vnops.c
===================================================================
RCS file: /home/ncvs/src/sys/ufs/ufs/ufs_vnops.c,v
retrieving revision 1.50
diff -u -r1.50 ufs_vnops.c
--- ufs_vnops.c 1997/05/17 18:32:53 1.50
+++ ufs_vnops.c 1997/05/27 13:11:19
@@ -1788,6 +1788,9 @@
} */ *ap;
{
+ if (ap->a_vp->v_flag & VXLOCK)
+ return TRUE;
+
return (lockstatus(&VTOI(ap->a_vp)->i_lock));
}
--
Doug Rabson Mail: dfr@nlsystems.com
Nonlinear Systems Ltd. Phone: +44 181 951 1891
Fax: +44 181 381 1039
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