On Mon, 9 Aug 2021 12:56:37 +0530, Suganath Prabu S wrote:
> Currently mpt3sas driver sets below predefined queue depth for the
> SAS/SATA/NVMe drives.
> SAS - 254
> SATA - 32
> NVME - 128
> IOC Firmware provides the queue depth for each device types through SAS
> IO Unit Page1 for SAS/SATA and PCIe IO Unit Page1 for NVMe devices. If
> the host sets the queue depth greater than the firmware recommended
> queue depth, then IOC places the IO’s above the recommended queue depth
> in an internal pending queue (consuming outstanding
> host-credit/resources and thereby leading to potential starvation to
> other devices) and sends them to the device once IO count drops below
> the recommended queue depth. So, it is better for the driver to set
> the device queue depth provided by the IOC firmware.
>
> [...]
Applied to 5.15/scsi-queue, thanks!
[1/2] mpt3sas: Use FW recommended device QD
https://git.kernel.org/mkp/scsi/c/787f2448c236
[2/2] mpt3sas: Update driver version to 39.100.00.00
https://git.kernel.org/mkp/scsi/c/cdc1767698a2
--
Martin K. Petersen Oracle Linux Engineering
