RE: [PATCH 10/13] megaraid_sas: set virt_boundary_mask in the scsi host

Kashyap Desai
2019-06-06T15:37:32Z

>
> This ensures all proper DMA layer handling is taken care of by the SCSI
> midlayer. Note that the effect is global, as the IOMMU merging is based
> off a
> paramters in struct device. We could still turn if off if no PCIe devices
> are
> present, but I don't know how to find that out.
>
> Also remove the bogus nomerges flag, merges do take the virt_boundary into
> account.

Hi Christoph, Changes for <megaraid_sas> and <mpt3sas> looks good. We want
to confirm few sanity before ACK. BTW, what benefit we will see moving
virt_boundry setting to SCSI mid layer ? Is it just modular approach OR any
functional fix ?

Kashyap