Re: Ummunotify: progress at last!

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Tue, Mar 23, 2010 at 10:59:42PM -0700, Roland Dreier wrote:

> That is all definitely doable.  I wonder if it's better to get rid of
> the dedicated fd though.  After all, having the fd means a fancy app can
> do poll() or sigio or whatever internally.  Being able to integrate into
> an fd-driven event loop seems like a pretty big thing to give up.

Not sure, adding the fd is only a small amount of work. But on the
other hand integrating with a completion channel might bet better
suited to verbs's API, and even less work..

> Also, having a uverbs "syscall" that is exactly like read() seems a bit
> of a stretch, even within the ugliness that is the uverbs interface.
> (We love all our children, but sometimes we have to be realistic)

I agree, but if the FD is eliminated then that seems like the best bet
- it wouldn't be exactly like read, it would be a multiplexed uverb
command executed over the uverbs fd.

Jason
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