kern/85464: Cannot unmount file-backed disk imported from NFS or
SMBFS
Andrey Simonenko
simon at comsys.ntu-kpi.kiev.ua
Tue Aug 30 08:40:17 GMT 2005
>Number: 85464
>Category: kern
>Synopsis: Cannot unmount file-backed disk imported from NFS or SMBFS
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Aug 30 08:40:16 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator: Andrey Simonenko <simon at comsys.ntu-kpi.kiev.ua>
>Release: FreeBSD 5.4-STABLE i386
>Organization:
>Environment:
FreeBSD 5.4-STABLE i386
>Description:
Cannot unmount file-backed disk imported from NFS or SMBFS:
1. Create file-backed disk on the server, put it on exported
file system by NFS or SMBFS.
2. On a client mount exported NFS or SMBFS file system.
3. Run mdconfig to attach file-backed disk from mounted NFS or
SMBFS file system and mount it (I worked with UFS file-backed
disks).
4. Then try to unmount file-backed disk.
The kernel shows following messages and refuses to unmount it:
For SMBFS:
Aug 30 10:04:27 comp1 kernel: fsync: giving up on dirty: 0xc149db58:
tag devfs, type VCHR, usecount 4, writecount 0, refcount 4, flags (VV_OBJBUF),
lock type devfs: EXCL (count 1) by thread 0xc111e780 (pid 555)
Aug 30 10:04:27 comp1 kernel: dev md0c
For NFS:
Aug 30 11:15:11 pm514-9 kernel: fsync: giving up on dirty: 0xc1a2f210:
tag devfs, type VCHR, usecount 3, writecount 0, refcount 4, flags (VV_OBJBUF),
lock type devfs: EXCL (count 1) by thread 0xc12d9480 (pid 492)
Aug 30 11:15:11 pm514-9 kernel: dev md0c
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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