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Date: Thu, 27 Feb 2003 19:58:33 +0100 (CET)
From: Matthias Buelow <mkb@informatik.uni-wuerzburg.de>
Reply-To: Matthias Buelow <mkb@informatik.uni-wuerzburg.de>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: 5.0-p2 kernel panic probably filesystem related
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>Number:         48755
>Category:       kern
>Synopsis:       5.0-p2 kernel panic probably filesystem related
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Feb 27 11:00:23 PST 2003
>Closed-Date:    Fri Oct 31 19:03:22 PST 2003
>Last-Modified:  Fri Oct 31 19:03:22 PST 2003
>Originator:     Matthias Buelow
>Release:        FreeBSD 5.0-RELEASE-p2 i386
>Organization:
>Environment:
System: FreeBSD reiher.informatik.uni-wuerzburg.de 5.0-RELEASE-p2 FreeBSD 5.0-RELEASE-p2 #0: Sun Feb 23 01:38:51 CET 2003 root@reiher.informatik.uni-wuerzburg.de:/usr/obj/usr/src/sys/REIHER i386

>Description:

Got a panic right now on 5.0-p2/i386, probably related to filesystem
stuff:

# gdb -k /boot/kernel/kernel ./vmcore.0 
GNU gdb 5.2.1 (FreeBSD)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-undermydesk-freebsd"...(no debugging symbols found)...
panic: bwrite: buffer is not busy???
panic messages:
---
panic: pmap_enter: attempted pmap_enter on 4MB page

syncing disks, buffers remaining... panic: bwrite: buffer is not busy???
Uptime: 17h3m21s
Dumping 511 MB
ata0: resetting devices ..
done
 16 32[CTRL-C to abort]  48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448[CTRL-C to abort]  464 480 496
---
#0  0xc01de84b in doadump ()
(kgdb) bt
#0  0xc01de84b in doadump ()
#1  0xc01decd6 in boot ()
#2  0xc01def23 in panic ()
#3  0xc021d692 in bwrite ()
#4  0xc021ec4e in vfs_bio_awrite ()
#5  0xc02ca63a in ffs_fsync ()
#6  0xc02c987e in ffs_sync ()
#7  0xc023070b in sync ()
#8  0xc01de94c in boot ()
#9  0xc01def23 in panic ()
#10 0xc031afed in pmap_enter ()
#11 0xc02dc8d4 in vm_fault ()
#12 0xc031e45f in trap_pfault ()
#13 0xc031df52 in trap ()
#14 0xc030f048 in calltrap ()
---Can't read userspace from dump, or kernel process---

I'll keep the crashdump for a while, in case someone wants
to extract some more info.

>How-To-Repeat:
>Fix:


>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: kris 
State-Changed-When: Sat Oct 11 01:37:18 PDT 2003 
State-Changed-Why:  
Does this problem persist in 5.1-CURRENT?  If so, please obtain 
full debugging information as described here: 

http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug.html 

http://www.freebsd.org/cgi/query-pr.cgi?pr=48755 
State-Changed-From-To: feedback->closed 
State-Changed-By: kris 
State-Changed-When: Fri Oct 31 19:03:12 PST 2003 
State-Changed-Why:  
Feedback timeout 

http://www.freebsd.org/cgi/query-pr.cgi?pr=48755 
>Unformatted:
