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ffdcd081f5
This is part of resolving the deadlock mentioned in commit "block: move draining out of bdrv_change_aio_context() and mark GRAPH_RDLOCK". The function bdrv_root_attach_child() runs under the graph lock, so it is not allowed to drain. It is called by: 1. blk_insert_bs(), where a drained section is introduced. 2. block_job_add_bdrv(), which holds the graph lock itself. block_job_add_bdrv() is called by: 1. mirror_start_job() 2. stream_start() 3. commit_start() 4. backup_job_create() 5. block_job_create() 6. In the test_blockjob_common_drain_node() unit test In all callers, a drained section is introduced. Signed-off-by: Fiona Ebner <f.ebner@proxmox.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-ID: <20250530151125.955508-13-f.ebner@proxmox.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> |
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