All of lore.kernel.org
 help / color / mirror / Atom feed
From: Frederic Weisbecker <frederic@kernel.org>
To: "Paul E. McKenney" <paulmck@kernel.org>
Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-team@meta.com, rostedt@goodmis.org
Subject: Re: [PATCH rcu 3/6 v2] rcu/exp: Remove superfluous full memory barrier upon first EQS snapshot
Date: Fri, 28 Jun 2024 13:20:55 +0200	[thread overview]
Message-ID: <Zn6cl8PJWd8hWS_R@localhost.localdomain> (raw)
In-Reply-To: <4a11271a-d873-4f1c-87e6-38874e38ac13@paulmck-laptop>

Le Thu, Jun 27, 2024 at 11:53:29AM -0700, Paul E. McKenney a écrit :
> On Thu, Jun 27, 2024 at 01:36:58PM +0200, Frederic Weisbecker wrote:
> > When the grace period kthread checks the extended quiescent state
> > counter of a CPU, full ordering is necessary to ensure that either:
> 
> Just to make sure that I understand...
> 
> I need to replace these commits in -rcu:
> 
> da979d0162fc6 rcu: Remove full ordering on second EQS snapshot
> 6411f4185f657 rcu: Remove superfluous full memory barrier upon first EQS snapshot
> dec56ca5f1c34 rcu/exp: Remove superfluous full memory barrier upon first EQS snapshot
> 
> With these three patches, and keep these three commits as they are?
> 
> d43a302fc08a5 rcu: Remove full memory barrier on boot time eqs sanity check
> b1c36aa90cbf1 rcu: Remove full memory barrier on RCU stall printout
> 64d68f1d53f77 rcu/exp: Remove redundant full memory barrier at the end of GP

Exactly! Those were the precisions I forgot to mention.

Thanks.

  reply	other threads:[~2024-06-28 11:20 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-06-04 22:26 [PATCH rcu 0/6] Grace-period memory-barrier adjustments for v6.11 Paul E. McKenney
2024-06-04 22:26 ` [PATCH rcu 1/6] rcu: Remove full ordering on second EQS snapshot Paul E. McKenney
2024-06-05 12:21   ` Frederic Weisbecker
2024-06-05 18:44     ` Paul E. McKenney
2024-06-26 15:03       ` Frederic Weisbecker
2024-06-26 15:32         ` Paul E. McKenney
2024-06-26 15:44           ` Frederic Weisbecker
2024-06-27 11:27   ` [PATCH rcu 1/6 v2] " Frederic Weisbecker
2024-06-04 22:26 ` [PATCH rcu 2/6] rcu: Remove superfluous full memory barrier upon first " Paul E. McKenney
2024-06-12  8:27   ` Neeraj upadhyay
2024-06-26 14:13     ` Frederic Weisbecker
2024-06-26 17:19       ` Neeraj upadhyay
2024-06-26 22:03         ` Frederic Weisbecker
2024-06-27  2:16           ` Neeraj upadhyay
2024-06-27  2:40             ` Neeraj upadhyay
2024-06-27 11:11               ` Frederic Weisbecker
2024-06-27 11:32   ` [PATCH rcu 2/6 v2] " Frederic Weisbecker
2024-06-04 22:26 ` [PATCH rcu 3/6] rcu/exp: " Paul E. McKenney
2024-06-12  8:44   ` Neeraj upadhyay
2024-06-12 14:45     ` Paul E. McKenney
2024-06-26 14:28     ` Frederic Weisbecker
2024-06-26 17:19       ` Neeraj upadhyay
2024-06-26 22:12         ` Frederic Weisbecker
2024-06-27  2:33           ` Neeraj upadhyay
2024-06-27 11:36   ` [PATCH rcu 3/6 v2] " Frederic Weisbecker
2024-06-27 18:53     ` Paul E. McKenney
2024-06-28 11:20       ` Frederic Weisbecker [this message]
2024-06-28 20:03         ` Paul E. McKenney
2024-06-04 22:26 ` [PATCH rcu 4/6] rcu: Remove full memory barrier on boot time eqs sanity check Paul E. McKenney
2024-06-04 22:26 ` [PATCH rcu 5/6] rcu: Remove full memory barrier on RCU stall printout Paul E. McKenney
2024-06-04 22:26 ` [PATCH rcu 6/6] rcu/exp: Remove redundant full memory barrier at the end of GP Paul E. McKenney
2024-06-12  5:21 ` [PATCH rcu 0/6] Grace-period memory-barrier adjustments for v6.11 Boqun Feng
2024-06-12  9:42 ` Neeraj Upadhyay
2024-06-12 14:46   ` Paul E. McKenney

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Zn6cl8PJWd8hWS_R@localhost.localdomain \
    --to=frederic@kernel.org \
    --cc=kernel-team@meta.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paulmck@kernel.org \
    --cc=rcu@vger.kernel.org \
    --cc=rostedt@goodmis.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.