Messages in this thread |  | | Date | Sat, 09 Feb 2013 08:36:10 +0100 | From | Martin Sustrik <> | Subject | Re: [PATCH 1/1] eventfd: implementation of EFD_MASK flag |
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On 09/02/13 04:54, Eric Wong wrote:
>>> Using one eventfd per userspace socket still seems a bit wasteful. >> >> Wasteful in what sense? Occupying a slot in file descriptor table? >> That's the price for having the socket uniquely identified by the >> fd. > > Yes. I realize eventfd is small, but I don't think eventfd is needed > at all, here. Just one pipe.
Ah. Got you! You mean not to change the kernel, just use pipe for the purpose.
However, the convoluted pipe-style design is the problem I am trying to solve rather than the solution. It leads to convoluted APIs with convoluted semantics as described in the article. I've been using that kind of design for past 8 years and every time I have to deal with it I swear that one day I will implement a proper in-kernel solution to get rid of the hack.
And now I have finally done so.
Martin
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