RE: [RFC] libibverbs IB Device Memory support

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> From: Ahmad Omary

> 
> Note that the device memory does not necessary have to be mapped to the
> CPU.
> i.e. is not necessary accessible by PCI, and can only be accessed by RDMA.
> This is why we can't use MMAP for all cases  and a dedicated allocation and
> copy functions are needed.
> 

You can also automate efficient copies, barriers, and flushes even when you do map a BAR directly.

Note that we are holding a concall today (*) to further discuss this topic.
--Liran

* See concall details at: http://marc.info/?l=linux-rdma&m=149660439926108&w=2

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