From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 2FF07385843E for ; Wed, 5 Jan 2022 11:38:55 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 2FF07385843E Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-520-cv2eFxkAOBm4cZu1swqQVg-1; Wed, 05 Jan 2022 06:38:51 -0500 X-MC-Unique: cv2eFxkAOBm4cZu1swqQVg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9F3EE81EE63; Wed, 5 Jan 2022 11:38:50 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.102]) by smtp.corp.redhat.com (Postfix) with ESMTPS id D82DC1073031; Wed, 5 Jan 2022 11:38:48 +0000 (UTC) From: Florian Weimer To: Szabolcs Nagy Cc: libc-alpha@sourceware.org, gcc-help@gcc.gnu.org, "Paul E. McKenney" , Tulio Magno Quites Machado Filho Subject: Re: Help needed for glibc software transaction memory algorithm References: <87v8yzfv3u.fsf@oldenburg.str.redhat.com> <20220104221427.GO3294453@arm.com> Date: Wed, 05 Jan 2022 12:38:46 +0100 In-Reply-To: <20220104221427.GO3294453@arm.com> (Szabolcs Nagy's message of "Tue, 4 Jan 2022 22:14:27 +0000") Message-ID: <87y23ue7jt.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-help@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-help mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Jan 2022 11:38:56 -0000 * Szabolcs Nagy: > this reminds me the discussion in section 4 and 5 of > > https://www.hpl.hp.com/techreports/2012/HPL-2012-68.pdf > > there are no 2 data copies here but i think the reasoning > about the synchronization may apply. Yes, I'll reference that and put in the acquire fence. Thanks. Florian