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librbd: deadlock while attempting to flush AIO requests #6508

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merged 2 commits into from Nov 10, 2015

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dillaman commented Nov 9, 2015

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dillaman added some commits Nov 9, 2015

tests: new test case to catch deadlock on RBD image refresh
Signed-off-by: Jason Dillaman <dillaman@redhat.com>
librbd: fixed deadlock while attempting to flush AIO requests
In-flight AIO requests might force a flush if a snapshot was created
out-of-band.  The flush completion was previously invoked asynchronously,
potentially via the same thread worker handling the AIO request. This
resulted in the flush operation deadlocking since it can't complete.

Fixes: #13726
Backport: infernalis, hammer
Signed-off-by: Jason Dillaman <dillaman@redhat.com>

jdurgin added a commit that referenced this pull request Nov 10, 2015

Merge pull request #6508 from dillaman/wip-13726
librbd: deadlock while attempting to flush AIO requests

Reviewed-by: Josh Durgin <jdurgin@redhat.com>

@jdurgin jdurgin merged commit de95d20 into ceph:jewel Nov 10, 2015

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aderumier commented Nov 10, 2015

Hi, I confirm that it's fix the problem for me.

Thanks !

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