linux-kernel - Re: Current LKMM patch disposition

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Message-ID: <Y920w4QRLtC6kd+x@rowland.harvard.edu>
Date:   Fri, 3 Feb 2023 20:28:35 -0500
From:   Alan Stern <stern@...land.harvard.edu>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        kernel-team@...a.com, mingo@...nel.org, parri.andrea@...il.com,
        will@...nel.org, peterz@...radead.org, boqun.feng@...il.com,
        npiggin@...il.com, dhowells@...hat.com, j.alglave@....ac.uk,
        luc.maranget@...ia.fr, akiyks@...il.com
Subject: Re: Current LKMM patch disposition

On Fri, Feb 03, 2023 at 04:48:43PM -0800, Paul E. McKenney wrote:
> Hello!
> 
> Here is what I currently have for LKMM patches:
> 
> 289e1c89217d4 ("locking/memory-barriers.txt: Improve documentation for writel() example")
> ebd50e2947de9 ("tools: memory-model: Add rmw-sequences to the LKMM")
> aae0c8a50d6d3 ("Documentation: Fixed a typo in atomic_t.txt")
> 9ba7d3b3b826e ("tools: memory-model: Make plain accesses carry dependencies")
> 
> 	Queued for the upcoming (v6.3) merge window.
> 
> c7637e2a8a27 ("tools/memory-model: Update some warning labels")
> 7862199d4df2 ("tools/memory-model: Unify UNLOCK+LOCK pairings to po-unlock-lock-")
> 
> 	Are ready for the next (v6.4) merge window.  If there is some
> 	reason that they should instead go into v6.3, please let us
> 	all know.
> 
> a6cd5214b5ba ("tools/memory-model: Document LKMM test procedure")
> 
> 	This goes onto the lkmm-dev pile because it is documenting how
> 	to use those scripts.
> 
> https://lore.kernel.org/lkml/Y9GPVnK6lQbY6vCK@rowland.harvard.edu/
> https://lore.kernel.org/lkml/20230126134604.2160-3-jonas.oberhauser@huaweicloud.com
> https://lore.kernel.org/lkml/20230203201913.2555494-1-joel@joelfernandes.org/
> 5d871b280e7f ("tools/memory-model: Add smp_mb__after_srcu_read_unlock()")
> 
> 	These need review and perhaps further adjustment.
> 
> So, am I missing any?  Are there any that need to be redirected?

The "Provide exact semantics for SRCU" patch should have:

	Portions suggested by Boqun Feng and Jonas Oberhauser.

added at the end, together with your Reported-by: tag.  With that, I 
think it can be queued for 6.4.

Alan