Re: dedicated list for rdma userspace programming

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2017-04-24 21:31 GMT+03:00 Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>:
> You would have to re-write the user space verbs provider for your
> hardware in a non-C language.
>

That is bad =(

> What you are asking is enormously non-trivial, rdma is 'special'
> because it has a user space driver component that directly
> communicates with the hardware, for performance.
>
> I'm not even sure one could implement a non-performant verbs using
> just the kernel API without a driver specific helper. The kernel API
> does not cover things like CQ parsing, for instance? At least nobody
> has ever done it...

Hm. For example some times ago i'm use srp/scst that utilize only
kernel space code.
I don't know any performance issues with it (but may be it presented..).


-- 
Vasiliy Tolstov,
e-mail: v.tolstov@xxxxxxxxx
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