linux-kernel - Re: [RFC v1 06/14] bus1: util

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Message-ID: <20161027152700.GH3175@twins.programming.kicks-ass.net>
Date:   Thu, 27 Oct 2016 17:27:00 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     David Herrmann <dh.herrmann@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Andy Lutomirski <luto@...capital.net>,
        Jiri Kosina <jikos@...nel.org>, Greg KH <greg@...ah.com>,
        Hannes Reinecke <hare@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Arnd Bergmann <arnd@...db.de>, Tom Gundersen <teg@...m.no>,
        Josh Triplett <josh@...htriplett.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC v1 06/14] bus1: util - queue utility library

On Wed, Oct 26, 2016 at 09:18:02PM +0200, David Herrmann wrote:
> Messages can be destined for multiple queues, hence, we need to be
> careful that all queues get a consistent order of incoming messages. We
> define the concept of `global order' to provide a basic set of
> guarantees. This global order is a partial order on the set of all
> messages. The order is defined as:

Ah, ok. So it _is_ a partial order only. I got confused by earlier
reports, and the term 'global order' in general, to think you did a
total order. And then I wondered wth you needed total ordering for.

Maybe best to scrub 'global order' from the entire text. It's not
helpful.