Skip site navigation (1)Skip section navigation (2)
Date:      Fri, 02 Feb 2001 16:03:26 +0000
From:      Ian Dowse <iedowse@maths.tcd.ie>
To:        Chris Williams <Chris.Williams@third-rail.net>
Cc:        "'freebsd-hackers@freebsd.org'" <freebsd-hackers@freebsd.org>, "'freebsd-stable@freebsd.org'" <freebsd-stable@freebsd.org>, iedowse@maths.tcd.ie
Subject:   Re: Have root on vinum, one small problem.. 
Message-ID:   <200102021603.aa24556@salmon.maths.tcd.ie>
In-Reply-To: Your message of "Fri, 02 Feb 2001 10:54:51 EST." <4FC7AFEB1135D41199260000F87A88260D9530@TRSBS> 

next in thread | previous in thread | raw e-mail | index | archive | help
In message <4FC7AFEB1135D41199260000F87A88260D9530@TRSBS>, Chris Williams write
s:
>
>Things seems to be working quite well, but there is one strange behavior which
> worries me; whenever I shut down, right after syncing I get a panic:
>
>panic: Vrele: negative ref cnt

I noticed this a while ago - it is due to inconsistent handling of
'rootvnode' in the kernel. You should find the details if you search
for 'rootvnode' in the -hackers archive.

The following patch should work around the panic by adding an extra
vnode reference for rootvp:

Ian

Index: init_main.c
===================================================================
RCS file: /FreeBSD/FreeBSD-CVS/src/sys/kern/init_main.c,v
retrieving revision 1.134.2.3
diff -u -r1.134.2.3 init_main.c
--- init_main.c	2000/09/07 19:13:36	1.134.2.3
+++ init_main.c	2001/02/02 16:01:52
@@ -456,6 +456,7 @@
 	VREF(fdp->fd_fd.fd_cdir);
 	VOP_UNLOCK(rootvnode, 0, &proc0);
 	fdp->fd_fd.fd_rdir = rootvnode;
+	VREF(fdp->fd_fd.fd_rdir);
 }
 SYSINIT(retrofit, SI_SUB_ROOT_FDTAB, SI_ORDER_FIRST, xxx_vfs_root_fdtab, NULL)



To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-stable" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi? <200102021603.aa24556>