From owner-freebsd-arm@FreeBSD.ORG Fri Feb 13 22:01:20 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 22ECFA8C for ; Fri, 13 Feb 2015 22:01:20 +0000 (UTC) Received: from phabric-backend.isc.freebsd.org (phabric-backend.isc.freebsd.org [IPv6:2001:4f8:3:ffe0:406a:0:50:2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id F1A61E7 for ; Fri, 13 Feb 2015 22:01:19 +0000 (UTC) Received: from phabric-backend.isc.freebsd.org (phabric-backend.isc.freebsd.org [127.0.1.5]) by phabric-backend.isc.freebsd.org (8.14.9/8.14.9) with ESMTP id t1DM1JZ3019903 for ; Fri, 13 Feb 2015 22:01:19 GMT (envelope-from root@phabric-backend.isc.freebsd.org) Received: (from root@localhost) by phabric-backend.isc.freebsd.org (8.14.9/8.14.9/Submit) id t1DM1Jh1019900; Fri, 13 Feb 2015 22:01:19 GMT (envelope-from root) Date: Fri, 13 Feb 2015 22:01:19 +0000 To: freebsd-arm@freebsd.org From: "rpaulo (Rui Paulo)" Subject: [Differential] [Requested Changes To] D1833: Add memory barriers to buf_ring Message-ID: <727a18b80886ae40e11d76bde7fb26f4@localhost.localdomain> X-Priority: 3 Thread-Topic: D1833: Add memory barriers to buf_ring X-Herald-Rules: none X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-To: X-Phabricator-Cc: X-Phabricator-Cc: In-Reply-To: References: Thread-Index: OGRiNDkxY2NmMjRiNTc0MjQ4YTYwNWVkNzIyIFTedC8= X-Phabricator-Sent-This-Message: Yes X-Mail-Transport-Agent: MetaMTA X-Auto-Response-Suppress: All X-Phabricator-Mail-Tags: , , MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="utf-8" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Feb 2015 22:01:20 -0000 rpaulo requested changes to this revision. rpaulo added a comment. This revision now requires changes to proceed. Hmm, I think these memory barriers were in the tree but were removed recently. I think it would be nice to use the atomic load acq/rel because this change could negatively impact x86. REVISION DETAIL https://reviews.freebsd.org/D1833 To: zbb, kmacy, imp, rpaulo Cc: adrian, freebsd-arm