Add a host template flag 'host_tagset' to enable the use of a global tagmap for block-mq.
Signed-off-by: Hannes Reinecke <[email protected]> --- drivers/scsi/scsi_lib.c | 2 ++ include/scsi/scsi_host.h | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index ba22866..00036cb 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -2193,6 +2193,8 @@ int scsi_mq_setup_tags(struct Scsi_Host *shost) shost->tag_set.cmd_size = cmd_size; shost->tag_set.numa_node = NUMA_NO_NODE; shost->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_SG_MERGE; + if (shost->hostt->host_tagset) + shost->tag_set.flags |= BLK_MQ_F_GLOBAL_TAGS; shost->tag_set.flags |= BLK_ALLOC_POLICY_TO_MQ_FLAG(shost->hostt->tag_alloc_policy); shost->tag_set.driver_data = shost; diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index 3cd8c3b..dff3ec1 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -457,6 +457,11 @@ struct scsi_host_template { unsigned no_async_abort:1; /* + * True if the host supports a host-wide tagspace + */ + unsigned host_tagset:1; + + /* * Countdown for host blocking with no commands outstanding. */ unsigned int max_host_blocked; -- 1.8.5.6
