panic in devstat_remove_entry

[Anish Mistry]

On Friday 05 December 2003 04:29 pm, Poul-Henning Kamp wrote:
> In message <20031205185949.GA861 at buffy.brucec.backnet>, Bruce Cran 
writes:
> >
> >--r5Pyd7+fXNt84Ff3
> >Content-Type: text/plain; charset=us-ascii
> >Content-Disposition: inline
> >
> >I've found a way to panic 5.2-BETA which I can trigger in two ways.
> 
> Can you try with this patch ?
> 
> 
> Index: geom_event.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/geom/geom_event.c,v
> retrieving revision 1.43
> diff -u -r1.43 geom_event.c
> --- geom_event.c	18 Nov 2003 07:54:12 -0000	1.43
> +++ geom_event.c	5 Dec 2003 21:29:03 -0000
> @@ -106,8 +106,12 @@
>  	KASSERT(error != 0,
>  	    ("g_orphan_provider(%p(%s), 0) error must be non-zero\n",
>  	     pp, pp->name));
> +	
>  	pp->error = error;
>  	mtx_lock(&g_eventlock);
> +	KASSERT(!(pp->flags & G_PF_ORPHAN),
> +	    ("g_orphan_provider(%p(%s)), already an orphan", pp, pp->name));
> +	pp->flags |= G_PF_ORPHAN;
>  	TAILQ_INSERT_TAIL(&g_doorstep, pp, orphan);
>  	mtx_unlock(&g_eventlock);
>  	wakeup(&g_wait_event);
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by 
incompetence.
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> 
Even with the patch I am getting a panic following Bruce's procedure.  As 
well as general problems playing cd, burning, etc.

-- 
Anish Mistry
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