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 ESMTP id 2E53E3893C52 for ; Mon, 12 Jul 2021 17:56:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 2E53E3893C52 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-98-dQ8q2HsvMxukFXmWNza7JA-1; Mon, 12 Jul 2021 13:56:01 -0400 X-MC-Unique: dQ8q2HsvMxukFXmWNza7JA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AB47A1023F5C; Mon, 12 Jul 2021 17:56:00 +0000 (UTC) Received: from oldenburg.str.redhat.com (ovpn-112-103.rdu2.redhat.com [10.10.112.103]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E671C18B42; Mon, 12 Jul 2021 17:55:59 +0000 (UTC) From: Florian Weimer To: Adhemerval Zanella Cc: libc-alpha@sourceware.org Subject: Re: [PATCH] Linux: Use 32-bit vDSO for clock_gettime, gettimeofday, time (bug 28071) References: <87czrqf5un.fsf@oldenburg.str.redhat.com> <878s2ef19p.fsf@oldenburg.str.redhat.com> <874kd2ey6s.fsf@oldenburg.str.redhat.com> <158cdbcb-5335-9ff4-cf3e-a45d8603d029@linaro.org> <878s2bdddm.fsf@oldenburg.str.redhat.com> <87zgurad11.fsf@oldenburg.str.redhat.com> <03207aa6-6bf3-febe-2b7f-30174faede60@linaro.org> <87bl77a9mn.fsf@oldenburg.str.redhat.com> <1f9dd3be-5731-ddab-cba6-1e4f302563b0@linaro.org> Date: Mon, 12 Jul 2021 19:55:56 +0200 In-Reply-To: <1f9dd3be-5731-ddab-cba6-1e4f302563b0@linaro.org> (Adhemerval Zanella's message of "Mon, 12 Jul 2021 12:46:45 -0300") Message-ID: <877dhv8lhv.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 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.9 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_H4, 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: 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: Mon, 12 Jul 2021 17:56:05 -0000 * Adhemerval Zanella: > I am almost sure it is a kernel issue specific to s390, where kernel does > not map the vDSO is there is no interpreter (it happens for static case > and for the loader directly). I think it was fixed upstream, although > s390 vDSO is also now gone on 5.5: Oh, that's it indeed. With a hard-coded dynamic linker path, there is again no system call. So this patch is good functionality-wise, too. Thanks, Florian