linux-ext4 - [Bug 200693] fsync() in the latest kernel (4.15.x ) Broken ????

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Message-ID: <bug-200693-13602-PjFQLlPEul@https.bugzilla.kernel.org/>
Date:   Wed, 01 Aug 2018 03:43:52 +0000
From:   bugzilla-daemon@...zilla.kernel.org
To:     linux-ext4@...nel.org
Subject: [Bug 200693] fsync() in the latest kernel (4.15.x ) Broken ????

https://bugzilla.kernel.org/show_bug.cgi?id=200693

Theodore Tso (tytso@....edu) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |tytso@....edu
         Resolution|---                         |UNREPRODUCIBLE

--- Comment #2 from Theodore Tso (tytso@....edu) ---
First, 4.15 is not the latest kernel.  It may be the latest *Ubuntu* kernel,
but this bugzilla is for upstream kernel development, not for Ubuntu kernels. 
If you have a complaint about an Ubuntu kernel, you should file it with the
Ubuntu bug tracking system.

I've used the btrace program (from the blktrace package), and verified that as
far as the upstream kernel is concerned, fsync was clearly working:

252,4    0     2346     3.637855121  6916  Q  WS 645592 + 8 [foo]
252,4    0     2347     3.640164007  6916  Q  WS 645592 + 8 [foo]
252,4    0     2348     3.642730677  6916  Q  WS 645592 + 8 [foo]
252,4    0     2349     3.645426881  6916  Q  WS 645592 + 8 [foo]
252,4    2     1623     3.648270538  6916  Q  WS 645592 + 8 [foo]
252,4    2     1624     3.650811476  6916  Q  WS 645592 + 8 [foo]
252,4    2     1625     3.653352656  6916  Q  WS 645592 + 8 [foo]
252,4    4     1585     3.654199271     0  C  WS 527264 + 8 [0]
252,4    4     1586     3.654214847     0  C  WS 527272 + 8 [0]
252,4    4     1587     3.655853164     0  C WFS 527280 + 8 [0]
252,4    4     1588     3.656583532  6680  Q  WS 527288 + 8 [jbd2/dm-4-8]
252,4    4     1589     3.656640851  6680  Q  WS 527296 + 8 [jbd2/dm-4-8]
252,4    4     1590     3.656914175  6680  Q FWFS 527304 + 8 [jbd2/dm-4-8]
252,4    1     1528     3.612347468     0  C WFS 526896 + 8 [0]
252,4    1     1529     3.612850602     0  C  WS 645592 + 8 [0]
252,4    1     1530     3.612996388  6680  Q  WS 526904 + 8 [jbd2/dm-4-8]
252,4    1     1531     3.613039457  6680  Q  WS 526912 + 8 [jbd2/dm-4-8]
252,4    1     1532     3.613196025     0  C  WS 526904 + 8 [0]
252,4    1     1533     3.613209660     0  C  WS 526912 + 8 [0]

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