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scsi: core: switch to scsi-mq by default 

It has been more than one year since we tried to change the default from
legacy to multi queue in SCSI with commit c279bd9e406 ("scsi: default to
scsi-mq"). But due to issues with suspend/resume and performance problems
it had been reverted again with commit cbe7dfa26e ("Revert "scsi: default
to scsi-mq"").

In the meantime there have been a substantial amount of performance
improvements and suspend/resume got fixed as well, thus we can re-enable
scsi-mq without a significant performance penalty.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Johannes Thumshirn 2018-07-04 10:53:56 +02:00 committed by Martin K. Petersen
parent fc21ae8927
commit d5038a13ec
1 changed files with 1 additions and 0 deletions
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drivers/scsi/Kconfig
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@ -49,6 +49,7 @@ config SCSI_NETLINK
config SCSI_MQ_DEFAULT
bool "SCSI: use blk-mq I/O path by default"
default y
depends on SCSI
---help---
This option enables the new blk-mq based I/O path for SCSI