linux-kernel - Re: [GIT PULL] kdbus for 4.1-rc1

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Message-ID: <20150415221804.GP889@ZenIV.linux.org.uk>
Date:	Wed, 15 Apr 2015 23:18:04 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Richard Weinberger <richard.weinberger@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>, Tom Gundersen <teg@...m.no>,
	Jiri Kosina <jkosina@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Daniel Mack <daniel@...que.org>,
	David Herrmann <dh.herrmann@...il.com>,
	Djalal Harouni <tixxdz@...ndz.org>
Subject: Re: [GIT PULL] kdbus for 4.1-rc1

On Wed, Apr 15, 2015 at 03:11:17PM -0700, Andy Lutomirski wrote:

> This is functionally identical to passing AF_UNIX socket fds over
> SCM_RIGHTS, but I want something much lighter weight.

Most of the weight in SCM_RIGHTS comes from the fact that you can
pass AF_UNIX sockets over it, which requires a garbage collector.
Exclude that and suddenly it becomes very cheap...
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