linux-ext4 - Re: Difference in jbd2 behavior between CentOS and Ubuntu while unmounting

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Date:	Wed, 18 May 2016 12:01:43 -0700
From:	Kamran Khan <krkhan@...pirated.com>
To:	"Theodore Ts'o" <tytso@....edu>
Cc:	"Darrick J. Wong" <darrick.wong@...cle.com>,
	Eric Sandeen <sandeen@...hat.com>, linux-ext4@...r.kernel.org
Subject: Re: Difference in jbd2 behavior between CentOS and Ubuntu while unmounting

On Wed, May 18, 2016 at 7:12 AM, Theodore Ts'o <tytso@....edu> wrote:
> Try the following to see if someone process is playing namespace games
>
> find /proc -name mounts | xargs grep /dev/sda3
>
> (replace /dev/sda3 with the device that you think is unmounted).
>
> When you find the process, kill it.  (Or try doing a service XXX
> restart assuming that the device has been unmounted in the "normal"
> mount namespace.)

That did the trick! systemd-udevd was the culprit. Somehow it wasn't
appearing in lsof/fuser outputs but had the block device listed in its
mounts.

Killed it and the block device was released for further operations.

Thanks!!
-- 
Kamran.

http://inspirated.com/
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