NetBSD Problem Report #8440

Received: (qmail 27314 invoked from network); 18 Sep 1999 20:23:35 -0000
Message-Id: <199909182024.WAA16948@smaug.fh-regensburg.de>
Date: Sat, 18 Sep 1999 22:24:59 +0200 (MEST)
From: Hubert Feyrer <hubertf@channel.regensburg.org>
Reply-To: hubert.feyrer@rz.uni-regensburg.de
To: gnats-bugs@gnats.netbsd.org
Subject: panic: vrele: ref cnt on 1.4.1/i386
X-Send-Pr-Version: 3.95

>Number:         8440
>Category:       kern
>Synopsis:       panic: vrele: ref cnt on 1.4.1/i386
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Sep 18 13:35:00 +0000 1999
>Closed-Date:    Fri Sep 21 15:42:15 +0000 2001
>Last-Modified:  Fri Sep 21 15:42:15 +0000 2001
>Originator:     Hubert Feyrer
>Release:        1.4.1
>Organization:
Hubert Feyrer <hubertf@channel.regensburg.org>
>Environment:

Dell Optiplex GX1p (PIII-500, 384MB RAM, 60% buffer cache)

>Description:
	I just got this (typed in manually):

	vrele: nad ref count: type VDIR, usecount -1, writecount 0, refcount 1,
		tag VT_UFS, ino 1936384, on dev 0, 4
	panic: vrele: ref cnt
	Stopped in mv at	_Debugger+0x4:  leave
	db> t
	_Debugger(fcfc3b94,fd1aa508,fcfbffff,fd151e50,f01526e8) at _Debugger+0x4
	_panic(f0152689,f0152674,fcfc3b94,fcfc3b94,fd151e74) at _panic+0x55
	_vrele(fcfc3b94) at _crele+0x50
	_rename_files(efbfd686,efbfd6bf,fd1aa508,0,fd151fa8) at _rename_files+0x3bf
	_sys_rename(fd1aa508,fd151f88,fd151f80,0,2) at _sys_rename+0x15
	_syscall() at _syscall+0x20e
	--- syscall (number 128) ---
	0x5e07:
	db>

	Looking at the source, it seems the vp->v_usecount < 0 is the 
	problem. Beyond that, I have no idea what this is. I just hope
	that the system isn't thrashed. :>

	This is a pretty vanilla 1.4.1 installation, btw. (kernel from
	1.4.1 sources, config can be provided).

	The system was in a big "make package" in pkgsrc when it crashed.


>How-To-Repeat:
	Please not.

>Fix:
	Unknown.
>Release-Note:
>Audit-Trail:

From: Hubert Feyrer <feyrer@rfhs8012.fh-regensburg.de>
To: hubert.feyrer@rz.uni-regensburg.de
Cc: gnats-bugs@gnats.netbsd.org
Subject: Re: kern/8440: panic: vrele: ref cnt on 1.4.1/i386
Date: Sat, 18 Sep 1999 22:37:36 +0200 (MET DST)

 On Sat, 18 Sep 1999, it was written:
 > 	db>

 To follow up myself:

 After I've typed "reboot" in ddb, I saw the infamous 
 Syncing buffers ..... 7 7 7 7 7 giving up
 message.

 I thought this wouldn't occur on a 1.4.1 system. :/


  - Hubert

 -- 
 NetBSD - Better for your uptime than Viagra

State-Changed-From-To: open->closed 
State-Changed-By: chs 
State-Changed-When: Fri Sep 21 08:41:26 PDT 2001 
State-Changed-Why:  
submitter says he hasn't seen it since. 
>Unformatted:

Home	PR Database Search