RE: [PATCH 09/15] megaraid_sas: Dual Queue depth support

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> -----Original Message-----
> From: Martin K. Petersen [mailto:martin.petersen@xxxxxxxxxx]
> Sent: Wednesday, January 27, 2016 7:32 AM
> To: Tomas Henzl
> Cc: Sumit Saxena; jbottomley@xxxxxxxxxxxxx; hch@xxxxxxxxxxxxx;
> martin.petersen@xxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; Kashyap Desai
> Subject: Re: [PATCH 09/15] megaraid_sas: Dual Queue depth support
>
> >>>>> "Tomas" == Tomas Henzl <thenzl@xxxxxxxxxx> writes:
>
> >> Yes this is already covered internally, there would be perf penalty
> >> with VDs in configuration but this feature will be turned on based on
> >> firmware settings and that specific firmware deployment has primary
> >> purpose of increasing JBOD performance. This focuses on firmware
> >> deployment with less VDs(or no) and more JBODs in configuration.
>
> Tomas> OK, so it is switched off by default in the firmware and the user
> Tomas> and an educated user can switch it on ? if so, it's fine for me.
>
> Sumit?

Yes, this feature will be enabled for specific firmware only. On rest of
firmware types, it will be disabled(not supported).

Thanks,
Sumit
>
> --
> Martin K. Petersen	Oracle Linux Engineering
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