linux-ext4 - [Bug 101751] New: 0009103: INFO: task nginx:2334 blocked for more than 120 seconds.

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Message-ID: <bug-101751-13602@https.bugzilla.kernel.org/>
Date:	Mon, 20 Jul 2015 11:45:20 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 101751] New: 0009103: INFO: task nginx:2334 blocked for more
 than 120 seconds.

https://bugzilla.kernel.org/show_bug.cgi?id=101751

            Bug ID: 101751
           Summary: 0009103: INFO: task nginx:2334 blocked for more than
                    120 seconds.
           Product: File System
           Version: 2.5
    Kernel Version: 3.10.84
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: ext4
          Assignee: fs_ext4@...nel-bugs.osdl.org
          Reporter: zakrzewskim@...pl
        Regression: No

Created attachment 183181
  --> https://bugzilla.kernel.org/attachment.cgi?id=183181&action=edit
dmesg logs

I'm getting constant hangs (random programs) with latest kernel 

Sometimes even saving simple vim file takes about 2 minutes !

I've replaced all hardware, motherboard, CPU disks and nothing.

Filesystem check passed.

It affects all our services but mostly nginx and qmail.

My CPU: Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz
Board: MSI X58 Pro-E (MS-7522)
Drives: 2x Intel 520 240 GB software RAID 1 + 2x WD RE4 3 TB software RAID 1

Please help me solving this.

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