From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by sourceware.org (Postfix) with ESMTP id E2E2B385DC0A for ; Tue, 30 Jun 2020 08:57:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org E2E2B385DC0A Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-112-AbP_gHWhNX-8OUk34eedkg-1; Tue, 30 Jun 2020 04:57:04 -0400 X-MC-Unique: AbP_gHWhNX-8OUk34eedkg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6E81910059A0; Tue, 30 Jun 2020 08:57:03 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-128.ams2.redhat.com [10.36.112.128]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 94377289B5; Tue, 30 Jun 2020 08:57:02 +0000 (UTC) From: Florian Weimer To: DJ Delorie Cc: libc-alpha@sourceware.org, mtk.manpages@gmail.com Subject: Re: [PATCH v2 2/2] manual: Document __libc_single_threaded References: Date: Tue, 30 Jun 2020 10:57:01 +0200 In-Reply-To: (DJ Delorie's message of "Mon, 29 Jun 2020 21:06:21 -0400") Message-ID: <874kqtszhe.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-7.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Jun 2020 08:57:11 -0000 * DJ Delorie: >> +Atomic operations can also be used on mappings shared among >> +single-threaded processes. This means that a compiler cannot use >> +@code{__libc_single_threaded} to optimize atomic operations, unless it >> +is able to prove that the memory is not shared. > > Ok. "must not" would be slightly more correct than "cannot" though. Thanks, applied. Florian