>Number:         11790
>Category:       port-sparc
>Synopsis:       umount yields "dirty buffers" and "panic: locking against myself"
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-sparc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 20 11:36:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     The Grey Wolf
>Release:        NetBSD 1.5N (current of 16 December 2000)
>Organization:
>Environment:
	
	machine: Sun SPARCstation 5 (sparc/sun4m)
	os: NetBSD 1.5N
	target: sparc/sun4m
>Description:
	umount on a mounted filesystem prints a message about dirty buffers
	followed immediately by a "panic: locking against myself"
>How-To-Repeat:
	mount any filesystem
	touch something on it
	umount it
>Fix:
	
>Release-Note:
>Audit-Trail:
>Unformatted:
 >>> Included, also:  /etc/fstab
 #disk	  mount 		filesys mount			dump	fsck
 #device   point 		type	flags			freq	pass
 #
 # standard disks 
 #
 /dev/sd3a / 			ffs 	rw,async 		1	1
 /dev/sd3d /var			ffs 	rw,async 		1	2
 /dev/sd1g /usr			ffs 	rw,async 		6 	2
 /dev/sd1h /holt 		ffs 	rw,async 		1 	3
 /dev/sd0a /export 		ffs 	rw,async 		1 	3
 /dev/sd5a /altroot		ffs	rw,async		1 	4
 /dev/sd5h /usr/src		ffs	rw,async		1 	5
 swap 	  /tmp 			mfs	rw,-s=131072,-f=1024,-b=8192 0	0
 #
 # Stripes, mirrors and concatenated devices
 #
 /dev/ccd0c /space		ffs	rw,async		1	1
 #
 # Swap
 #
 /dev/sd0b - 			swap	dp			0	0
 /dev/sd0b -			swap	sw			0	0
 /dev/sd2b - 			swap	sw			0	0
 /dev/sd5b - 			swap	sw			0	0
 #
 # Removable media
 #
 /dev/cd0a /hsfs 		cd9660	ro,noauto		0	0
 /dev/cd0a /cdrom 		ffs	ro,noauto		0	0
 /dev/fd0a /pcfs 		msdos	rw,noauto		0	0
 /dev/fd0a /floppy 		ffs	rw,noauto		0	0
 #
 # Special Filesystems	
 proc	/proc			procfs	rw			0	0
 kernfs	/kern 			kernfs	rw			0	0
 >>> end /etc/fstab
 
 *** NOTE:  SOFTDEPS ARE *NOT* ENABLED! ***
 	
 System: NetBSD starwolf.com 1.5N NetBSD 1.5N (STARWOLF) #16: Sat Dec 16 23:49:05 PST 2000 greywolf@starwolf.com:/usr/src/sys/arch/sparc/compile/STARWOLF sparc