From: Hannes Reinecke <[email protected]> Add a host template flag 'host_tagset' to enable the use of a global tagset for block-mq.
Cc: Hannes Reinecke <[email protected]> Cc: Arun Easi <[email protected]> Cc: Omar Sandoval <[email protected]>, Cc: "Martin K. Petersen" <[email protected]>, Cc: James Bottomley <[email protected]>, Cc: Christoph Hellwig <[email protected]>, Cc: Don Brace <[email protected]> Cc: Kashyap Desai <[email protected]> Cc: Peter Rivera <[email protected]> Cc: Mike Snitzer <[email protected]> Signed-off-by: Hannes Reinecke <[email protected]> Signed-off-by: Ming Lei <[email protected]> --- drivers/scsi/scsi_lib.c | 2 ++ include/scsi/scsi_host.h | 3 +++ 2 files changed, 5 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index a86df9ca7d1c..8e6f118f1066 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2291,6 +2291,8 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost) shost->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE; shost->tag_set.flags |= BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy); + if (shost->hostt->host_tagset) + shost->tag_set.flags |= BLK_MQ_F_HOST_TAGS; shost->tag_set.driver_data = shost; return blk_mq_alloc_tag_set(&shost->tag_set); diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 1a1df0d21ee3..1b35d9cb59b3 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -457,6 +457,9 @@ struct scsi_host_template { */ unsigned int max_host_blocked; + /* True if the host supports a host-wide tagspace */ + unsigned host_tagset:1; + /* * Default value for the blocking. If the queue is empty, * host_blocked counts down in the request_fn until it restarts -- 2.9.5
