https://lists.ubuntu.com/archives/kernel-team/2016-November/080877.html
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Trusty)
Status: New => In Progress
** Changed in: linux (Ubuntu Trusty)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
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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:
In Progress
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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