Bug 838512

Summary: Tuned tries to remount a device mounted more than once on the system and fails
Product: Red Hat Enterprise Linux 6 Reporter: Vadim Grinco <vgrinco>
Component: tunedAssignee: Jaroslav Škarvada <jskarvad>
Status: CLOSED ERRATA QA Contact: Branislav Blaškovič <bblaskov>
Severity: medium Docs Contact:
Priority: medium    
Version: 6.3CC: azelinka, bblaskov, jskarvad
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Cause: The "mount" command is used to remount file systems with no_barriers, but not all file systems can be remounted. Consequence: The remount command can fail and error message can be displayed which may confuse users. Fix: The error messages from the mount command were silenced. Result: If the file system cannot be remounted with no_barriers, it is silently skipped and no error is displayed.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2013-11-21 11:33:01 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
Proposed fix none

Description Vadim Grinco 2012-07-09 10:06:55 UTC 
Description of problem:
/etc/tune-profiles/enterprise-storage/ktune.sh (and probably others) is not able to correctly mount a GFS2 volume mounted twice or more times on the same system with the same journal id.

Version-Release number of selected component (if applicable):
tuned-0.2.19-7.el6.noarch

How reproducible:
Always.

Steps to Reproduce:
1. Configure /dev/<path_to>/<gfs2_volume> to mount to /mnt/a and /mnt/b in /etc/fstab
2. Reboot system
  
Actual results:
ktune.sh tries to mount /mnt/a and /mnt/b with nobarrier option, which is impossible in the configuration above.

Expected results:
Exclude /mnt/a and /mnt/b from the list of devices that have to be mounted with nobarrier option.
Comment 2 RHEL Program Management 2012-09-07 05:34:20 UTC 
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unable to address this
request at this time.

Red Hat invites you to ask your support representative to
propose this request, if appropriate, in the next release of
Red Hat Enterprise Linux.
Comment 6 Jaroslav Škarvada 2013-07-22 16:55:17 UTC 
I will just silence the error, because remounting local mounts with nobarrier can pass:

# mount
...
/dev/loop0 on /var/tmp/a type gfs2 (rw)
/dev/loop0 on /var/tmp/b type gfs2 (rw)

# mount -o remount,barrier=0 /var/tmp/a

# mount
...
/dev/loop0 on /var/tmp/a type gfs2 (rw,nobarrier)
/dev/loop0 on /var/tmp/b type gfs2 (rw)
Comment 7 Jaroslav Škarvada 2013-07-23 20:16:16 UTC 
Created attachment 777456 [details]
Proposed fix
Comment 9 Branislav Blaškovič 2013-09-30 06:53:02 UTC 
As mentioned in comment #6, there is no need for automatic test in my opinion. Patch looks sane and it applies correctly.

Marking Sanity only.
Comment 10 errata-xmlrpc 2013-11-21 11:33:01 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1623.html