Bug 337981 - VFS: Busy inodes after unmount following NFS problems
Summary: VFS: Busy inodes after unmount following NFS problems
Status: CLOSED DUPLICATE of bug 253663
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel   
(Show other bugs)
Version: 5.2
Hardware: x86_64
OS: Linux
Target Milestone: rc
: ---
Assignee: Steve Dickson
QA Contact: Martin Jenner
Whiteboard: GSSApproved
Keywords: ZStream
Depends On:
Blocks: 424251
TreeView+ depends on / blocked
Reported: 2007-10-18 14:06 UTC by Bob Gautier
Modified: 2008-01-24 20:51 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2008-01-24 20:51:17 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Bob Gautier 2007-10-18 14:06:42 UTC
Description of problem:

Following some trouble with remote NFS (v3) file systems, the machine crashed
having logged the following message:

VFS: Busy inodes after unmount of 0:1f. Self-destruct in 5 seconds.  Have a nice

Version-Release number of selected component (if applicable):

kernel 2.6.18-8.el5

How reproducible:

This was a single crash, probably provoked by very special circumstances

Steps that led to the crash:

User tries to access a stale NFS mount:

    cd /path1

The user tried to clear the stale mount by unmounting:

    umount /path1

This failed with 'device is busy'.  Locating the processes that were keeping the
stale mount busy, the user tried to kill them, eventually resorting to

    kill -9 pid...

The processes went away and

    umount /path1

succeeeded.  The filesystem was then remounted:

    mount server:/path/to/files /path1

The original job could then be performed, and the file system unmounted:

    cd /path1
    # do stuff...
    umount /path1

Another NFS filesystem was then mounted:

    mount server:/path/to/more/files /path2

Files were written to the /path2 tree without error

Finally, the user did:

    cd /path2/OS/
    createrepo ... 

At this point, the machine crashed.  We don't know when the 'have a nice day'
message was logged relative to the crash.

Comment 6 RHEL Product and Program Management 2007-11-21 18:46:00 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update

Comment 14 Don Zickus 2008-01-24 20:51:17 UTC

*** This bug has been marked as a duplicate of 253663 ***

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