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

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Message-Id: <20151029.184955.728736673434401711.davem@davemloft.net>
Date:	Thu, 29 Oct 2015 18:49:55 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	nacc@...ux.vnet.ibm.com
Cc:	hch@...radead.org, keith.busch@...el.com, aik@...abs.ru,
	linux-kernel@...r.kernel.org, linux-nvme@...ts.infradead.org,
	paulus@...ba.org, sparclinux@...r.kernel.org,
	willy@...ux.intel.com, linuxppc-dev@...ts.ozlabs.org,
	david@...son.dropbear.id.au
Subject: Re: [PATCH 0/5 v3] Fix NVMe driver support on Power with 32-bit DMA

From: Nishanth Aravamudan <nacc@...ux.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...
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