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由 Max Reitz 提交于
This patch adds a test where we cancel a throttled mirror job and immediately close the VM before it can be cancelled. Doing so will invoke bdrv_drain_all() while the mirror job tries to drain the throttled node. When bdrv_drain_all_end() tries to lift its drain on the throttle node, the job will exit and replace the current root node of the BB drive0 (which is the job's filter node) by the throttle node. Before the previous patch, this replacement did not increase drive0's quiesce_counter by a sufficient amount, so when bdrv_parent_drained_end() (invoked by bdrv_do_drained_end(), invoked by bdrv_drain_all_end()) tried to end the drain on all of the throttle node's parents, it decreased drive0's quiesce_counter below 0 -- which fails an assertion. Signed-off-by: NMax Reitz <mreitz@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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