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linux/drivers/target/target_core_device.c
Mike Christie 268975a87c scsi: target: Move delayed/ordered tracking to per CPU 
The atomic use from the delayed/ordered tracking is causing perf issues
when using higher perf backend devices and multiple queues.  This moves
the values to a per CPU counter. Combined with the per CPU stats patch,
this improves IOPS by up to 33% for 8K IOS when using 4 or more queues
from the initiator.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20250424032741.16216-3-michael.christie@oracle.com
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-04-28 21:47:55 -04:00

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