linux/drivers/scsi/hisi_sas
Xiang Chen b1a49412f0 scsi: hisi_sas: optimise the usage of hisi_hba.lock
Currently hisi_hba.lock is locked to deliver and receive a command
to/from any hw queue. This causes much contention at high data-rates.

To boost performance, lock on a per queue basis for sending and
receiving commands to/from hw.

Certain critical regions still need to be locked in the delivery and
completion stages with hisi_hba.lock.

New element hisi_sas_device.dq is added to store the delivery queue for
a device, so it does not need to be needlessly re-calculated for every
task.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2017-06-19 21:31:25 -04:00
..
hisi_sas_main.c scsi: hisi_sas: optimise the usage of hisi_hba.lock 2017-06-19 21:31:25 -04:00
hisi_sas_v1_hw.c scsi: hisi_sas: optimise the usage of hisi_hba.lock 2017-06-19 21:31:25 -04:00
hisi_sas_v2_hw.c scsi: hisi_sas: optimise the usage of hisi_hba.lock 2017-06-19 21:31:25 -04:00
hisi_sas.h scsi: hisi_sas: optimise the usage of hisi_hba.lock 2017-06-19 21:31:25 -04:00
Kconfig scsi: hisi_sas: fix SATA dependency 2017-03-29 22:44:53 -04:00
Makefile hisi_sas: add bare v2 hw driver 2016-02-23 21:27:02 -05:00