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Message-ID: <39815e48-a035-4701-9a88-f3b753551b28@paulmck-laptop>
Date: Wed, 12 Jun 2024 07:46:21 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: Neeraj Upadhyay <Neeraj.Upadhyay@...nel.org>
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org, kernel-team@...a.com,
rostedt@...dmis.org
Subject: Re: [PATCH rcu 0/6] Grace-period memory-barrier adjustments for v6.11
On Wed, Jun 12, 2024 at 03:12:07PM +0530, Neeraj Upadhyay wrote:
> On Tue, Jun 04, 2024 at 03:26:46PM -0700, Paul E. McKenney wrote:
> > Hello!
> >
> > This series removes redundant memory barriers from the grace-period
> > code paths:
> >
> > 1. Remove full ordering on second EQS snapshot, courtesy of Frederic
> > Weisbecker.
> >
> > 2. Remove superfluous full memory barrier upon first EQS snapshot,
> > courtesy of Frederic Weisbecker.
> >
> > 3. rcu/exp: Remove superfluous full memory barrier upon first EQS
> > snapshot, courtesy of Frederic Weisbecker.
> >
> > 4. Remove full memory barrier on boot time eqs sanity check,
> > courtesy of Frederic Weisbecker.
> >
> > 5. Remove full memory barrier on RCU stall printout, courtesy of
> > Frederic Weisbecker.
> >
> > 6. rcu/exp: Remove redundant full memory barrier at the end of GP,
> > courtesy of Frederic Weisbecker.
> >
>
> Reviewed-by: Neeraj Upadhyay <neeraj.upadhyay@...nel.org>
I will apply yours and Boqun's tag on the next rebase, thank you both!
Thanx, Paul
> > ------------------------------------------------------------------------
> >
> > b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst | 6 +--
> > b/kernel/rcu/tree.c | 2 -
> > b/kernel/rcu/tree_exp.h | 8 +++-
> > b/kernel/rcu/tree_stall.h | 4 +-
> > kernel/rcu/tree.c | 19 +++-------
> > kernel/rcu/tree_exp.h | 8 +++-
> > 6 files changed, 26 insertions(+), 21 deletions(-)
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