Subject: kern/12143: panic: ffs_unmount: flush left dirty bufs
To: None <>
From: None <>
List: netbsd-bugs
Date: 02/06/2001 23:32:17
>Number:         12143
>Category:       kern
>Synopsis:       panic: ffs_unmount: flush left dirty bufs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 06 23:35:00 PST 2001
>Originator:     Jesse Off <>
>Release:        NetBSD 1.5R
NetBSD 1.5R kernel compiled yesterday / 1.5 ALPHA2 userland.

	While doing a make release, I got this panic when the build was
	unmounting the vnd0 device for the floppy creation.
	repeated make release until you get this.
	Don't know.  We had this problem in LFS due to races at
	umount time.  It was fixed by putting in proper locking with vfs_busy() 
	Maybe something similar?