From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BD1B9C49ED6 for ; Wed, 11 Sep 2019 19:58:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8EFEA2089F for ; Wed, 11 Sep 2019 19:58:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730460AbfIKT6R (ORCPT ); Wed, 11 Sep 2019 15:58:17 -0400 Received: from mx1.redhat.com ([209.132.183.28]:32928 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728244AbfIKT6Q (ORCPT ); Wed, 11 Sep 2019 15:58:16 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 826FD307D8E3; Wed, 11 Sep 2019 19:58:16 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-117-150.ams2.redhat.com [10.36.117.150]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 250266012A; Wed, 11 Sep 2019 19:58:09 +0000 (UTC) From: Florian Weimer To: Carlos O'Donell Cc: Mathieu Desnoyers , Joseph Myers , Szabolcs Nagy , libc-alpha@sourceware.org, Thomas Gleixner , Ben Maurer , Peter Zijlstra , "Paul E. McKenney" , Boqun Feng , Will Deacon , Dave Watson , Paul Turner , Rich Felker , linux-kernel@vger.kernel.org, linux-api@vger.kernel.org Subject: Re: [PATCH glibc 2.31 1/5] glibc: Perform rseq(2) registration at C startup and thread creation (v12) References: <20190807142726.2579-1-mathieu.desnoyers@efficios.com> <20190807142726.2579-2-mathieu.desnoyers@efficios.com> <8736h2sn8y.fsf@oldenburg2.str.redhat.com> <7db64714-3dc5-b322-1edc-736b08ee7d63@redhat.com> <87ef0mr6qj.fsf@oldenburg2.str.redhat.com> <4a6f6326-ea82-e031-0fe0-7263ed97e797@redhat.com> <877e6er4ls.fsf@oldenburg2.str.redhat.com> Date: Wed, 11 Sep 2019 21:58:08 +0200 In-Reply-To: <877e6er4ls.fsf@oldenburg2.str.redhat.com> (Florian Weimer's message of "Wed, 11 Sep 2019 21:54:23 +0200") Message-ID: <8736h2r4fj.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.48]); Wed, 11 Sep 2019 19:58:16 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Florian Weimer: > * Carlos O'Donell: > >> On 9/11/19 3:08 PM, Florian Weimer wrote: >>> * Carlos O'Donell: >>> >>>> It would be easier to merge the patch set if it were just an unconditional >>>> registration like we do for set_robust_list(). >>> >>> Note that this depends on the in-tree system call numbers list, which I >>> still need to finish according to Joseph's specifications. >> >> Which work is this? Do you have a URL reference to WIP? > > > Sorry, there was also this: I also posted a build-many-glibcs.py patch at some point with an automatic table update, but that still had the massive bot-cycle time. My current line of thinking is to implement some --use-compilers flag, so that you can build a fresh glibc checkout against an old, pre-built compilers for the system call tables update, and then use the patched glibc sources for one (and hopefully final) bot-cycle. Thanks, Florian