Messages in this thread |  | | From | Logan Gunthorpe <> | Date | Thu, 1 Mar 2018 16:52:23 -0700 | Subject | Re: [PATCH v2 10/10] nvmet: Optionally use PCI P2P memory |
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On 01/03/18 04:49 PM, Keith Busch wrote: > On Thu, Mar 01, 2018 at 11:00:51PM +0000, Stephen Bates wrote: >> >> P2P is about offloading the memory and PCI subsystem of the host CPU >> and this is achieved no matter which p2p_dev is used. > > Even within a device, memory attributes for its various regions may not be > the same. There's a meaningful difference between writing to an NVMe CMB > vs PMR, and a single device could have both. We don't want to lump these > all together without knowing which region you're allocating from, right?
Yes, PMRs are a whole other beast. I have no idea what anyone is going to actually do with those yet. But no one is proposing to publish them as p2pmem with this code.
Logan
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