linux-ext4 - [4.1-rc] File was modified, but mtime stayed the same (according to unison)

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Message-ID: <20150609104330.GA29980@amd>
Date:	Tue, 9 Jun 2015 12:43:30 +0200
From:	Pavel Machek <pavel@....cz>
To:	tytso@....edu, adilger.kernel@...ger.ca,
	linux-ext4@...r.kernel.org,
	kernel list <linux-kernel@...r.kernel.org>, jack@...e.cz
Subject: [4.1-rc] File was modified, but mtime stayed the same (according to
 unison)

Hi!

Today, I got strange warning from unison:

pavel/.config/chromium/Default/Extension State/LOG.old — transport
failure
• The source file /data/pavel/.config/chromium/Default/Extension
State/LOG.old
has been modified but the fast update detection mechanism
failed to detect it.  Try running once with the fastcheck
option set to 'no'.

Filesystem is plain ext4.
pavel@amd:~$ cat /proc/mounts  | grep /data
/dev/sda2 /data ext4 rw,relatime,errors=remount-ro,data=ordered 0 0
pavel@amd:~$ uname -a
Linux amd 4.1.0-rc5 #23 SMP Wed May 27 09:19:18 CEST 2015 x86_64
GNU/Linux

Now, I know mount -oloop can do such "silent updates"... but that
should not be case for chromium. unison 2.40.102. Any ideas?

Thanks,
								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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