From: Peter Zijlstra <peterz@infradead.org>
To: Andrea Parri <andrea.parri@amarulasolutions.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>,
linux-kernel@vger.kernel.org, dvyukov@google.com,
stern@rowland.harvard.edu, keescook@chromium.org
Subject: Re: [PATCH] refcount_t: add ACQUIRE ordering on success for dec(sub)_and_test variants
Date: Wed, 30 Jan 2019 15:21:47 +0100 [thread overview]
Message-ID: <20190130142147.GD2296@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20190130123131.GA20517@andrea>
On Wed, Jan 30, 2019 at 01:31:31PM +0100, Andrea Parri wrote:
> On Wed, Jan 30, 2019 at 01:18:51PM +0200, Elena Reshetova wrote:
> > This adds an smp_acquire__after_ctrl_dep() barrier on successful
> > decrease of refcounter value from 1 to 0 for refcount_dec(sub)_and_test
> > variants and therefore gives stronger memory ordering guarantees than
> > prior versions of these functions.
> >
> > Co-developed-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
>
> Reviewed-by: Andrea Parri <andrea.parri@amarulasolutions.com>
Thanks, got it queued now.
next prev parent reply other threads:[~2019-01-30 14:21 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-30 11:18 [PATCH v2] Adding smp_acquire__after_ctrl_dep barrier Elena Reshetova
2019-01-30 11:18 ` [PATCH] refcount_t: add ACQUIRE ordering on success for dec(sub)_and_test variants Elena Reshetova
2019-01-30 12:31 ` Andrea Parri
2019-01-30 14:21 ` Peter Zijlstra [this message]
2019-02-04 8:59 ` [tip:locking/core] refcount_t: Add ACQUIRE ordering on success for dec(sub)_and_test() variants tip-bot for Elena Reshetova
-- strict thread matches above, loose matches on Subject: below --
2019-01-28 12:09 [PATCH] refcount_t: add ACQUIRE ordering on success for dec(sub)_and_test variants Elena Reshetova
2019-01-28 14:29 ` Andrea Parri
2019-01-29 9:51 ` Peter Zijlstra
2019-01-29 13:39 ` Reshetova, Elena
2019-01-29 14:00 ` Dmitry Vyukov
2019-01-29 17:37 ` Reshetova, Elena
2019-01-30 3:33 ` Andrea Parri
2019-01-30 10:19 ` Reshetova, Elena
2019-01-30 10:34 ` Dmitry Vyukov
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