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alistair23-linux/drivers/scsi/mpt3sas
Sreekanth Reddy eedc42a074 scsi: mpt3sas: Fix msix load balance on and off settings
Enable msix load balance only when combined reply queue mode is disabled on
the SAS3 and above generation HBA devices.

Earlier msix load balance used to enable if the number of online cpus is
greater than the number of MSI-X vectors enabled on the HBA.  Combined reply
queue mode will be disabled only on those HBA which works in shared
resources mode. I.e. on SAS3 HBAs it will be <= 8 and on SAS35 HBA devices
it will be <= 16.

 - Before this patch if system has 256 logical CPUs and HBA exposes 128
   MSI-X vectors, driver will enable msix load balance.

 - After this patch if system has 256 logical CPUs and HBA exposes 128
   MSI-X vectors, driver will disable msix load balance.

 - After this patch if system has 256 logical CPUs and HBA exposes 16 MSI-X
   vectors (due to combined reply queue mode being off in HW), driver will
   enable msix load balance.

Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-06-26 22:58:34 -04:00
..
mpi scsi: mpt3sas: Enable interrupt coalescing on high iops 2019-06-18 19:46:26 -04:00
Kconfig scsi: mpt3sas: Irq poll to avoid CPU hard lockups 2019-03-18 17:16:43 -04:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpt3sas_base.c scsi: mpt3sas: Fix msix load balance on and off settings 2019-06-26 22:58:34 -04:00
mpt3sas_base.h scsi: mpt3sas: Determine smp affinity on per HBA basis 2019-06-26 22:58:34 -04:00
mpt3sas_config.c scsi: mpt3sas: Enable interrupt coalescing on high iops 2019-06-18 19:46:26 -04:00
mpt3sas_ctl.c scsi: mpt3sas: use DEVICE_ATTR_{RO, RW} 2019-06-20 16:28:02 -04:00
mpt3sas_ctl.h scsi: mpt3sas: Increase event log buffer to support 24 port HBA's. 2018-05-08 00:34:20 -04:00
mpt3sas_debug.h mpt2sas, mpt3sas: Remove SCSI_MPTXSAS_LOGGING entry from Kconfig 2015-11-11 18:31:14 -05:00
mpt3sas_scsih.c scsi: mpt3sas: make driver options visible in sys 2019-06-20 16:27:54 -04:00
mpt3sas_transport.c scsi: mpt3sas: function pointers of request descriptor 2019-06-18 19:46:25 -04:00
mpt3sas_trigger_diag.c scsi: mpt3sas: Convert uses of pr_<level> with MPT3SAS_FMT to ioc_<level> 2018-10-10 22:00:43 -04:00
mpt3sas_trigger_diag.h mpt2sas, mpt3sas: Update attribution language to Avago 2015-01-13 16:27:27 +01:00
mpt3sas_warpdrive.c scsi: mpt3sas: Convert uses of pr_<level> with MPT3SAS_FMT to ioc_<level> 2018-10-10 22:00:43 -04:00