Public bug reported:

--------------------------
xfstest fails with wrong md5 sum when inserting blocks at same offset

# uname -a
Linux ltc-haba1 4.10.0-8-generic #10-Ubuntu SMP Mon Feb 13 14:00:06 UTC 2017 
ppc64le ppc64le ppc64le GNU/Linux

Steps to reproduce:
----------------------------------------
1. Create a loop device with ext4 filesystem
2. git clone git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git; cd 
xfstests-dev
3. ./configure && make
4. Create a local.conf for running with created loop device
5.. Run xfstests-dev test  : ./check -g auto

The test 404 fails with following
-#342 2fef7cc7c9b24f9a37b63c85b24a999a  -
-#343 1608cc4f11dfd20a29586353970d8490  -
-#344 cf8c90020b16d7fdda010494d45c8471  -
-#345 47aa3937b31eeb6a56bcc2f6f46d6311  -
...
+#342 dd2a1e366aebeea3c6f0f466095a7426  -
+#343 caa72c4045b0fe41305ff7eaaa5bfe69  -
+#344 e65f3a3ec70d2bdf7d58f5d5fc6d3808  -
+#345 a15105b7b99f8763678f58e8279323ac  -

md5sum is different for last 158 blocks

Full fail log is attached.


Particular test case 404  was added newly as a part of commit  
2504b26a3a71d499ff745cdb007556ba20123fe5.

** Affects: xfstt (Ubuntu)
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-152344 severity-high 
targetmilestone-inin1704

** Tags added: architecture-ppc64le bugnameltc-152344 severity-high
targetmilestone-inin1704

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https://bugs.launchpad.net/bugs/1671368

Title:
  xfstest fails when inserting blocks at same offset ( ext4 )

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