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** Tags added: verification-needed-trusty

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https://bugs.launchpad.net/bugs/1641129

Title:
  aio completions are dropped

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Trusty:
  Fix Committed

Bug description:
  In 3.13.0-100-generic (14.04 stable kernel), we are hitting an old AIO
  bug, described in this thread

   http://www.gossamer-threads.com/lists/linux/kernel/1993181

  reproduced by this

   http://www.kvack.org/~bcrl/20140824-aio_bug.c

  The bug was introduced by

   f8567a3845ac05bb28f3c1b478ef752762bd39ef

  and I believe it was fixed by

   d856f32a86b2b015ab180ab7a55e455ed8d3ccc5

  I'm not certain if there were follow-on fixes after that.

  The bug is affecting Ceph OSD daemons, which hit this pretty reliably
  when using the new BlueStore backend.

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