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Bug #21207
closedbluestore: asyn cdeferred_try_submit deadlock
% Done:
0%
Source:
Tags:
Backport:
luminous
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Component(RADOS):
Pull request ID:
Crash signature (v1):
Crash signature (v2):
Description
In deferred_aio_finish we may need to requeue pending deferred via a finisher. Currently we reuse finishers0, but that thread may be busy doing completions back into the OSD. deadlock!
2017-08-31 18:00:40.308327 7f6ffd4ca700 20 bluestore(/var/lib/ceph/osd/ceph-4) _deferred_aio_finish queuing async deferred_try_submit
..but not deferred_try_submit call follows.
/a/sage-2017-08-31_16:29:40-rados-wip-sage-testing2-2017-08-31-0908-distro-basic-smithi/1583842
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