linux-ext4 - [Bug 76821] New: jbd2 write on disk each 5/6 seconds

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Date:	Sat, 24 May 2014 12:14:10 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 76821] New: jbd2 write on disk each 5/6 seconds

https://bugzilla.kernel.org/show_bug.cgi?id=76821

            Bug ID: 76821
           Summary: jbd2 write on disk each 5/6 seconds
           Product: File System
           Version: 2.5
    Kernel Version: 3.14.4-1-ARCH
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@...nel-bugs.osdl.org
          Reporter: abdelhak@...ptolab.net
        Regression: No

➜  ~  sudo iotop -obtqqq | grep jbd2             
[sudo] password for hacko: 
13:12:05   390 be/3 root        0.00 B/s    0.00 B/s  0.00 %  0.87 %
[jbd2/sda6-8]
13:12:06   390 be/3 root        0.00 B/s   31.45 K/s  0.00 %  2.48 %
[jbd2/sda6-8]
13:12:12   111 be/3 root        0.00 B/s   11.53 K/s  0.00 %  4.99 %
[jbd2/sda3-8]
13:12:19   390 be/3 root        0.00 B/s    3.84 K/s  0.00 %  2.98 %
[jbd2/sda6-8]
13:12:25   390 be/3 root        0.00 B/s    3.84 K/s  0.00 %  5.91 %
[jbd2/sda6-8]
13:12:25   111 be/3 root        0.00 B/s   23.03 K/s  0.00 %  5.71 %
[jbd2/sda3-8]
13:12:31   390 be/3 root        0.00 B/s    3.84 K/s  0.00 %  4.42 %
[jbd2/sda6-8]
13:12:32   390 be/3 root        0.00 B/s    0.00 B/s  0.00 %  0.03 %
[jbd2/sda6-8]
13:12:34   390 be/3 root        0.00 B/s   23.05 K/s  0.00 %  7.62 %
[jbd2/sda6-8]
13:12:39   390 be/3 root        0.00 B/s   26.86 K/s  0.00 %  4.40 %
[jbd2/sda6-8]
13:12:46   390 be/3 root        0.00 B/s    3.83 K/s  0.00 %  4.42 %
[jbd2/sda6-8]
13:12:53   390 be/3 root        0.00 B/s   11.49 K/s  0.00 %  4.31 %
[jbd2/sda6-8]
13:13:01   390 be/3 root        0.00 B/s   11.53 K/s  0.00 %  4.46 %
[jbd2/sda6-8]
13:13:07   390 be/3 root        0.00 B/s    7.69 K/s  0.00 %  4.55 %
[jbd2/sda6-8]
13:13:12   390 be/3 root        0.00 B/s   11.56 K/s  0.00 %  4.85 %
[jbd2/sda6-8]
13:13:19   390 be/3 root        0.00 B/s   11.56 K/s  0.00 %  4.27 %
[jbd2/sda6-8]
13:13:23   390 be/3 root        0.00 B/s   46.13 K/s  0.00 %  9.26 %
[jbd2/sda6-8]
13:13:26   390 be/3 root        0.00 B/s    7.54 K/s  0.00 %  6.05 %
[jbd2/sda6-8]
13:13:31   390 be/3 root        0.00 B/s   30.01 K/s  0.00 %  4.60 %
[jbd2/sda6-8]

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