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 [216.205.24.124]) by sourceware.org (Postfix) with ESMTP id 0CE353858D33 for ; Wed, 7 Apr 2021 19:03:55 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 0CE353858D33 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-143-zl77lzC2ONWLit3WmgfrWA-1; Wed, 07 Apr 2021 15:03:53 -0400 X-MC-Unique: zl77lzC2ONWLit3WmgfrWA-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 949BC1856A65; Wed, 7 Apr 2021 19:03:51 +0000 (UTC) Received: from oldenburg.str.redhat.com (ovpn-112-12.rdu2.redhat.com [10.10.112.12]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CEC1260C4A; Wed, 7 Apr 2021 19:03:49 +0000 (UTC) From: Florian Weimer To: Adhemerval Zanella Cc: Michal Nazarewicz , libc-alpha@sourceware.org, carlos@systemhalted.org Subject: Re: [PATCH] linux: sysconf: limit _SC_MAX_ARG to 6 MiB [BZ #25305] References: <20210407151058.1176364-1-mina86@mina86.com> <6c926d3b-3094-f220-7777-91dacf975275@linaro.org> <878s5u7x9g.fsf@oldenburg.str.redhat.com> <5e390f1e-3c31-c4e9-aae0-168f0b4725c7@linaro.org> Date: Wed, 07 Apr 2021 21:04:03 +0200 In-Reply-To: <5e390f1e-3c31-c4e9-aae0-168f0b4725c7@linaro.org> (Adhemerval Zanella's message of "Wed, 7 Apr 2021 15:52:57 -0300") Message-ID: <87pmz57w7w.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.4 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_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: Wed, 07 Apr 2021 19:03:56 -0000 * Adhemerval Zanella: > IMHO being conservative and use the lower bound of all supported kernels. > I really don't think trying to be smart here with dynamic probing > will add much, specially since this upper limit is what kernel will > support from now on. Ah, if the conservative choice does not penalize newer kernels, then I guess that's okay as well. Then the argument goes like this: If you want us to make the limit dynamic, add something to the auxiliary vector. 8-) Thanks, Florian