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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 0A10B3857C50 for ; Tue, 10 May 2022 19:18:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 0A10B3857C50 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-475-yDZEBDuEO1-J-On3pX9h6w-1; Tue, 10 May 2022 15:18:54 -0400 X-MC-Unique: yDZEBDuEO1-J-On3pX9h6w-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0F982395AFF3; Tue, 10 May 2022 19:18:54 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.113]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8781C7C2F; Tue, 10 May 2022 19:18:48 +0000 (UTC) From: Florian Weimer To: Christian Brauner Cc: Adhemerval Zanella , libc-alpha@sourceware.org, Alexey Izbyshev , Carlos O'Donell Subject: Re: [PATCH v4 0/3] Linux: Fix posix_spawn when user with time namespaces References: <20220510191155.1998575-1-adhemerval.zanella@linaro.org> Date: Tue, 10 May 2022 21:18:46 +0200 In-Reply-To: <20220510191155.1998575-1-adhemerval.zanella@linaro.org> (Adhemerval Zanella's message of "Tue, 10 May 2022 16:11:52 -0300") Message-ID: <877d6tb3hl.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 10.11.54.5 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE 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: Tue, 10 May 2022 19:19:01 -0000 * Adhemerval Zanella: > The patchset adds some support to tests the fallback code to > use only use CLONE_VFORK. It uses unshare directly because > it simpler than add container support. > > Adhemerval Zanella (3): > linux: Add CLONE_NEWTIME from Linux 5.6 to bits/sched.h > support: Add support_enter_time_namespace > linux: Add fallback for clone failure on posix_spawn (BZ #29115) Christan, how likely is it that we'd get another time namespace variant that would only become effective after execve (when the DSO is remapped anyway)? This is a lot of complexity in posix_spawn implementations for what is a rather limited use case. Thanks, Florian