From: Hannes Reinecke <h...@suse.com> Add a host template flag 'host_tagset' to enable the use of a global tagset for block-mq.
Cc: Hannes Reinecke <h...@suse.de> Cc: Arun Easi <arun.e...@cavium.com> Cc: Omar Sandoval <osan...@fb.com>, Cc: "Martin K. Petersen" <martin.peter...@oracle.com>, Cc: James Bottomley <james.bottom...@hansenpartnership.com>, Cc: Christoph Hellwig <h...@lst.de>, Cc: Don Brace <don.br...@microsemi.com> Cc: Kashyap Desai <kashyap.de...@broadcom.com> Cc: Peter Rivera <peter.riv...@broadcom.com> Cc: Mike Snitzer <snit...@redhat.com> Signed-off-by: Hannes Reinecke <h...@suse.com> Signed-off-by: Ming Lei <ming....@redhat.com> --- 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