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librbd: cancel ops before blocking IO
Ops might have in-flight IO -- blocking IO after canceling the ops will result in the in-flight IO being flushed. Shutdown also requires an intermediate state where is still acts like it downs the lock until after all ops are canceled and all IO is flushed. Signed-off-by: Jason Dillaman <dillaman@redhat.com>
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Jason Dillaman
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Apr 12, 2016
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