From: Florian Weimer <fweimer@redhat.com>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Segher Boessenkool <segher@kernel.crashing.org>,
Will Deacon <will@kernel.org>, paulmck <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
Andrea Parri <parri.andrea@gmail.com>,
Boqun Feng <boqun.feng@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
David Howells <dhowells@redhat.com>,
j alglave <j.alglave@ucl.ac.uk>,
luc maranget <luc.maranget@inria.fr>, akiyks <akiyks@gmail.com>,
linux-toolchains <linux-toolchains@vger.kernel.org>,
linux-arch <linux-arch@vger.kernel.org>
Subject: Re: [RFC PATCH] LKMM: Add ctrl_dep() macro for control dependency
Date: Fri, 01 Oct 2021 18:26:11 +0200 [thread overview]
Message-ID: <871r54ww2k.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <2088260319.47978.1633104808220.JavaMail.zimbra@efficios.com> (Mathieu Desnoyers's message of "Fri, 1 Oct 2021 12:13:28 -0400 (EDT)")
* Mathieu Desnoyers:
> One cheap way to achieve said R->W dependency (as well as R->RW on
> architectures which to not reorder R->R) is to ensure that the
> generated assembly contains a conditional branch.
Will any conditional branch do, or is it necessary that it depends in
some way on the data read?
Thanks,
Florian
next prev parent reply other threads:[~2021-10-01 16:26 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-28 21:15 [RFC PATCH] LKMM: Add ctrl_dep() macro for control dependency Mathieu Desnoyers
2021-09-29 12:06 ` Marco Elver
2021-10-01 15:45 ` Mathieu Desnoyers
2021-10-01 16:20 ` Linus Torvalds
2021-10-01 17:28 ` Mathieu Desnoyers
2021-10-01 18:18 ` Linus Torvalds
2021-09-29 12:28 ` Florian Weimer
2021-09-29 17:41 ` Segher Boessenkool
2021-09-29 19:46 ` Florian Weimer
2021-10-01 16:13 ` Mathieu Desnoyers
2021-10-01 16:26 ` Florian Weimer [this message]
2021-10-01 16:35 ` Linus Torvalds
2021-10-10 14:02 ` Florian Weimer
2021-10-14 0:01 ` Paul E. McKenney
2021-10-14 2:14 ` Alan Stern
2021-10-14 16:14 ` Paul E. McKenney
2021-10-14 15:58 ` Florian Weimer
2021-10-14 16:23 ` Paul E. McKenney
2021-10-14 18:19 ` Florian Weimer
2021-10-14 21:09 ` Paul E. McKenney
2021-10-14 22:36 ` Linus Torvalds
2021-09-30 13:28 ` Mathieu Desnoyers
2021-09-29 14:47 ` Linus Torvalds
2021-09-29 14:54 ` Linus Torvalds
2021-09-29 19:50 ` Mathieu Desnoyers
2021-09-29 20:13 ` Mathieu Desnoyers
2021-09-29 19:27 ` Mathieu Desnoyers
2021-09-29 22:14 ` Linus Torvalds
2021-09-29 21:47 ` Segher Boessenkool
2021-09-29 23:57 ` Paul E. McKenney
2021-10-01 15:28 ` Mathieu Desnoyers
2021-10-01 22:53 ` Paul E. McKenney
2021-10-01 19:10 ` Segher Boessenkool
2021-10-01 22:50 ` Paul E. McKenney
2021-10-02 14:29 ` Alan Stern
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