linux-kernel - RE: [PATCH] refcount: provide same memory ordering guarantees as in atomic

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Message-ID: <2236FBA76BA1254E88B949DDB74E612B802BC764@IRSMSX102.ger.corp.intel.com>
Date:   Mon, 13 Nov 2017 16:01:11 +0000
From:   "Reshetova, Elena" <elena.reshetova@...el.com>
To:     "paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "keescook@...omium.org" <keescook@...omium.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "ishkamiel@...il.com" <ishkamiel@...il.com>,
        Will Deacon <will.deacon@....com>,
        "stern@...land.harvard.edu" <stern@...land.harvard.edu>,
        "parri.andrea@...il.com" <parri.andrea@...il.com>,
        "boqun.feng@...il.com" <boqun.feng@...il.com>,
        "dhowells@...hat.com" <dhowells@...hat.com>,
        "david@...morbit.com" <david@...morbit.com>
Subject: RE: [PATCH] refcount: provide same memory ordering guarantees as in
 atomic_t


> On Mon, Nov 13, 2017 at 09:09:57AM +0000, Reshetova, Elena wrote:
> > <snip>
> >
> > > Note that there's work done on better documents and updates to this one.
> > > One document that might be good to read (I have not in fact had time to
> > > read it myself yet :-():
> > >
> > >   https://github.com/aparri/memory-
> > > model/blob/master/Documentation/explanation.txt
> >
> > I have just finished reading over this and must say that this is excellent.
> > If I would have started reading on this topic from this doc and then move
> > to other in-tree docs, including memory-barriers.txt, I would
> > have had much less issues/questions and it would be much less of a bumpy
> > read.
> 
> Glad you like it!  May we have your Acked-by?

I think my Acked-by has little value in this case since I am really a beginner in it
myself, but I would strongly suggest to Peter and others to consider inclusion 
of this doc into the tree since I do see a value in it. Again, I am not really an
important person here :)

> 
> > Is there any plan to include it into official kernel doc tree? I really think it
> > would be very helpful for others also even basically to explain the notations,
> properties
> > and language people talk about these issues and give examples.
> 
> Yes, we do plan to submit it for inclusion.

Great, I think it would help people!

Best Regards,
Elena.

> 
> 
> 		Thanx, Paul
> 
> > I will try to improve a bit the new doc I have previously sent a patch for in the
> > spirit of this reading.
> >
> >
> > Best Regards,
> > Elena.
> >