Date: Mon, 02 Jul 2001 23:55:42 -0400 From: Mike Tancsa <mike@sentex.net> To: Tor.Egge@fast.no Cc: freebsd-stable@freebsd.org Subject: Re: HELP! Server crashes since last cvsupdate! Message-ID: <4.2.2.20010702235346.02089a00@192.168.0.12> In-Reply-To: <200107022355.BAA02807@midten.fast.no> References: <Your message of "Mon, 2 Jul 2001 10:54:43 %2B0200 (CEST)"> <Pine.BSF.4.33.0107021049580.7438-100000@klima.physik.uni-mainz.de>
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Hi,
Just wondering as both of the patches have to do with mfs, is this
lockup that people are running into only triggered by those who use mfs ?
---Mike
At 01:55 AM 7/3/2001 +0200, Tor.Egge@fast.no wrote:
> > Hello.
> >
> > Since our last update Friday, 29th June, both SMP machines run
> > into a "stuck" condition after a while. This happened now two times
> > and I do not know what happens.
>
>I updated one machine from a 22th June -stable kernel and immediately
>got a 'hang' at boot when starting sendmail. Breaking out to ddb
>showed the following backtrace.
>
>db> trace
>SMP_breakpoint(c44d4c00,c46d3200,0,c0273d5b,f0f60) at SMP_breakpoint+0x1e
>siointr1(c44d4c00,c03c3008,0,e6442f3c,c027258a) at siointr1+0x13d
>siointr(c44d4c00) at siointr+0x17
>Xfastintr4(c46d3200,0,e6442f58,c01ac825,e6442f90) at Xfastintr4+0x2a
>vop_noislocked(e6442f90,e6442f9c,c01af24b,e6442f90,0) at vop_noislocked+0x19
>vop_defaultop(e6442f90) at vop_defaultop+0x15
>sched_sync(0) at sched_sync+0xaf
>fork_trampoline() at fork_trampoline+0x30
>
>
>The machine hung in lockstatus (called from vop_noislocked) trying to
>obtain the interlock of what lockstatus believed to be a struct lock
>but wasn't. A suggested fix is enclosed.
>
>- Tor Egge
>
>Index: sys/ufs/mfs/mfs_vfsops.c
>===================================================================
>RCS file: /home/ncvs/src/sys/ufs/mfs/Attic/mfs_vfsops.c,v
>retrieving revision 1.81.2.1
>diff -u -2 -r1.81.2.1 mfs_vfsops.c
>--- sys/ufs/mfs/mfs_vfsops.c 2001/06/17 05:05:00 1.81.2.1
>+++ sys/ufs/mfs/mfs_vfsops.c 2001/07/02 23:28:25
>@@ -249,4 +249,5 @@
> addaliasu(devvp, makeudev(253, mfs_minor++));
> devvp->v_data = mfsp;
>+ lockinit(&mfsp->mfs_lock, PVFS, "mfslck", 0, LK_NOPAUSE);
> mfsp->mfs_baseoff = args.base;
> mfsp->mfs_size = args.size;
>Index: sys/ufs/mfs/mfsnode.h
>===================================================================
>RCS file: /home/ncvs/src/sys/ufs/mfs/Attic/mfsnode.h,v
>retrieving revision 1.12
>diff -u -2 -r1.12 mfsnode.h
>--- sys/ufs/mfs/mfsnode.h 1999/08/28 00:52:26 1.12
>+++ sys/ufs/mfs/mfsnode.h 2001/07/02 23:28:25
>@@ -43,4 +43,5 @@
>
> struct mfsnode {
>+ struct lock mfs_lock;
> struct vnode *mfs_vnode; /* vnode associated with this
> mfsnode */
> caddr_t mfs_baseoff; /* base of file system in memory */
--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Network Administration, mike@sentex.net
Sentex Communications www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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