linux-kernel - Re: AF_BUS socket address family

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Message-ID: <CAKnu2Mr_TWvBXmL+ORfddpEgPdPxPXFpJdCtvPe+imj6o6Y+1w@mail.gmail.com>
Date:	Thu, 5 Jul 2012 09:59:53 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Vincent Sanders <vincent.sanders@...labora.co.uk>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	"David S. Miller" <davem@...emloft.net>,
	Arve Hjønnevåg <arve@...roid.com>,
	Daniel Walker <dwalker@...o99.com>,
	John Stultz <john.stultz@...aro.org>,
	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: Re: AF_BUS socket address family

2012/6/29 Vincent Sanders <vincent.sanders@...labora.co.uk>:

> AF_BUS is a message oriented inter process communication system.

We have a very huge and important in-kernel IPC message passer
in drivers/staging/android/binder.c

It's deployed in some 400 million devices according to latest reports.
John Stultz & Anton Vorontsov are trying to look after these Android
drivers a bit...

I and others discussed this in the past with the Android folks. Dianne
makes an excellent summary of how it works here:
https://lkml.org/lkml/2009/6/25/3

If we could all be convinced that this thing also fulfills the needs
of what binder does, this is a pretty solid case for it too. I can
sure see that some of the shortcuts that Android is taking with
binder try to address the same issue of high-speed IPC loopholes
through the kernel and some kind of security model.

Whether Android would actually use it (or wrap it) is a totally
different question, but what I think we need to know is whether it
*could*. And staging code has to move forward, maybe this
is the direction it should move?

Yours,
Linus Walleij
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