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64bdcbc449
Add a use_cmd_list flag in struct Scsi_Host to request keeping track of all outstanding commands per device. Default behaviour is not to keep track of cmd_list per sdev, as this may introduce lock contention. (overhead is more on multi-node NUMA.), and only enable it on the two drivers that need it. Signed-off-by: Kashyap Desai <[email protected]> Reviewed-by: Martin K. Petersen <[email protected]> Reviewed-by: Bart Van Assche <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]>