mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Tejun Heo <tj@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Oleg Nesterov <oleg@redhat.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>, Chris Mason <clm@fb.com>,
	linux-kernel@vger.kernel.org, kernel-team@fb.com
Subject: Re: [PATCH 1/2] kthread: add barriers to set_kthread_struct() and to_kthread()
Date: Thu, 16 Mar 2017 12:09:44 -0400	[thread overview]
Message-ID: <20170316160944.GE15810@htj.duckdns.org> (raw)
In-Reply-To: <20170316155534.zbtmy5v7gh6pbuhl@hirez.programming.kicks-ass.net>

On Thu, Mar 16, 2017 at 04:55:34PM +0100, Peter Zijlstra wrote:
> > Oops, as for adding lockless_assign_pointer(), wouldn't smp_wmb() be a
> > better match for smp_read_barrier_depends()?  ISTR acquire/release
> > pairs being more expensive on some archs.
> 
> 88c1863066cc ("rcu: Define rcu_assign_pointer() in terms of smp_store_release()")

Hmmm, nice, can we always prefer store_release over wmb from now on?

Thanks.

-- 
tejun

  reply	other threads:[~2017-03-16 16:09 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-15 23:18 Tejun Heo
2017-03-15 23:19 ` [PATCH 2/2] kthread, cgroup: close race window where new kthreads can be migrated to non-root cgroups Tejun Heo
2017-03-16 15:02   ` Oleg Nesterov
2017-03-16 15:39     ` Oleg Nesterov
2017-03-16 16:07       ` Tejun Heo
2017-03-16 16:31         ` Oleg Nesterov
2017-03-16 17:41           ` Tejun Heo
2017-03-16 16:05     ` Tejun Heo
2017-03-16 16:17       ` Oleg Nesterov
2017-03-16 17:03         ` Tejun Heo
2017-03-16 20:54   ` [PATCH v2] cgroup, kthread: " Tejun Heo
2017-03-17 13:50     ` Oleg Nesterov
2017-03-17 14:44       ` Tejun Heo
2017-03-16 14:54 ` [PATCH 1/2] kthread: add barriers to set_kthread_struct() and to_kthread() Oleg Nesterov
2017-03-16 15:33   ` Tejun Heo
2017-03-16 15:38     ` Tejun Heo
2017-03-16 15:46       ` Oleg Nesterov
2017-03-16 15:55       ` Peter Zijlstra
2017-03-16 16:09         ` Tejun Heo [this message]
2017-03-16 16:14           ` Peter Zijlstra

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=20170316160944.GE15810@htj.duckdns.org \
    --to=tj@kernel.org \
    --cc=akpm@linux-foundation.org \
    --cc=clm@fb.com \
    --cc=kernel-team@fb.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=oleg@redhat.com \
    --cc=peterz@infradead.org \
    --cc=tglx@linutronix.de \
    --cc=torvalds@linux-foundation.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®