Date: 18 Jun 2003 19:49:09 -0400 From: Chris Shenton <chris@shenton.org> To: Don Lewis <truckman@FreeBSD.org> Cc: current@FreeBSD.org Subject: Re: 5.1-CURRENT hangs on disk i/o? sysctl_old_user() non-sleepable locks Message-ID: <87u1an9cay.fsf@PECTOPAH.shenton.org> In-Reply-To: <200306180320.h5I3KjM7053484@gw.catspoiler.org> References: <200306180320.h5I3KjM7053484@gw.catspoiler.org>
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Don Lewis <truckman@FreeBSD.org> writes:
> Try the very untested patch below ...
> RCS file: /home/ncvs/src/sys/kern/uipc_syscalls.c,v
> retrieving revision 1.150
> Try the very untested patch below ...
> diff -u -r1.150 uipc_syscalls.c
> --- uipc_syscalls.c 12 Jun 2003 05:52:09 -0000 1.150
> +++ uipc_syscalls.c 18 Jun 2003 03:14:42 -0000
> @@ -1775,10 +1775,13 @@
> */
> if ((error = fgetvp_read(td, uap->fd, &vp)) != 0)
> goto done;
> + vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
> if (vp->v_type != VREG || VOP_GETVOBJECT(vp, &obj) != 0) {
> error = EINVAL;
> + VOP_UNLOCK(vp, 0, td);
> goto done;
> }
> + VOP_UNLOCK(vp, 0, td);
Tried it, rebuilt kernel, rebooted, no affect :-(
You were correct about apache using it. Doing a simple
fetch http://pectopah/
causes the error, dropping me into ddb if panic enabled. A "tr" shows
the same trace as I submitted yesterday :-(
Time to find that null modem cable.
Thanks.
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