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13fe8e6825
The current command UBLK_CMD_DEL_DEV won't return until the device is released, this way looks more reliable, but makes userspace more difficult to implement, especially about orders: unmap command buffer(which holds one ublkc reference), ublkc close, io_uring_file_unregister, ublkb close. Add UBLK_CMD_DEL_DEV_ASYNC so that device deletion won't wait release, then userspace needn't worry about the above order. Actually both loop and nbd is deleted in this async way. Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20240223075539.89945-3-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
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