[PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA

Nishanth Aravamudan nacc at linux.vnet.ibm.com
Fri Oct 30 14:35:46 PDT 2015

On 29.10.2015 [18:49:55 -0700], David Miller wrote:
> From: Nishanth Aravamudan <nacc at linux.vnet.ibm.com>
> Date: Thu, 29 Oct 2015 08:57:01 -0700
> > So, would that imply changing just the NVMe driver code rather than
> > adding the dma_page_shift API at all? What about
> > architectures that can support the larger page sizes? There is an
> > implied performance impact, at least, of shifting the IO size down.
> > 
> > Sorry for the continuing questions -- I got lots of conflicting feedback
> > on the last series and want to make sure v4 is more acceptable.
> In the long term I would be very happy to see us having a real interface
> for this stuff, just my opinion...

Yep, I think I'll try and balance the two -- fix NVMe for now with a 4K
page size as suggested by Christoph, and then work on the more complete
API for the next merge.


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