On 01/22/2016 02:41 PM, Johannes Thumshirn wrote: > Allow the activation of the scsi-mq feature on a per-driver bassis as opposed > to the current stack global (de)activation. > > This allows us to have setups which can combine "slow" rotational media and > fast media on two different HBA types. > > The following is from a host with rotational disks behind a HP SAS Adapter and > a fibre channel array behind a Emulex FC Adapter. The hpsa driver does not > support scsi-mq yet (and has rotational disks attached to it), but the lpfc > does. This patch allows an optimal combination of the scsi-mq enabled lpfc > driver and the hpsa driver which still uses a single queue scsi layer and thus > can make use of IO schedulers. > > host:~ # cat /sys/block/sd?/queue/scheduler > noop deadline [cfq] > none > none > none > none > none > none > none > none > none > none > none > none > none > none > none > none > > Signed-off-by: Johannes Thumshirn <[email protected]> > --- > drivers/scsi/fnic/fnic_main.c | 10 ++++++++++ > drivers/scsi/hosts.c | 2 +- > drivers/scsi/lpfc/lpfc_init.c | 8 ++++++++ > drivers/scsi/virtio_scsi.c | 11 +++++++++++ > include/scsi/scsi_host.h | 3 --- > 5 files changed, 30 insertions(+), 4 deletions(-) > Reviewed-by: Hannes Reinecke <[email protected]>
Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking [email protected] +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
