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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT autolearn=ham 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 E0C8BC43381 for ; Mon, 18 Mar 2019 08:59:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD9602082F for ; Mon, 18 Mar 2019 08:59:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ViYNm6vV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727225AbfCRI7j (ORCPT ); Mon, 18 Mar 2019 04:59:39 -0400 Received: from merlin.infradead.org ([205.233.59.134]:53176 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726291AbfCRI7i (ORCPT ); Mon, 18 Mar 2019 04:59:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=1ALmgar4B3X6CqTSYLBcFD1k8l6NcBpwpstUxNSyhdg=; b=ViYNm6vVENIq+R/bqPElRTcaJ IPFONXJ73t6pthX+imVELQky2WZ4ecvDQx77Y1O39OxsQlSpq17/AEg7XVt19/hoqt2yGBanq+Auc 59kAdBi+RB1rGp/vSlAIB0cZh6f8sMB6r5oUMw/sEyjXq3BLeZtZGVVlK34Jur3AaDhdHgnnSJetU 5EZkFg4ahRrGV5TIdQqHIRZcNj4L4+eQk0n3oalbB+pIebwZUzA8ZZI3UyGtJJYglIvvo9nXGtOFy ZMzvB46HyFztKfFOhJgRVZHAJ37gOdAzuOpRgwFsdQPFmh09KFKKHJz2uaE2SMNM3PgVVbYnUInJH vrGtyxOBA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by merlin.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1h5o74-0007ix-W8; Mon, 18 Mar 2019 08:59:19 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 894CD202194EA; Mon, 18 Mar 2019 09:59:16 +0100 (CET) Date: Mon, 18 Mar 2019 09:59:16 +0100 From: Peter Zijlstra To: hpa@zytor.com Cc: Matthias Kaehlcke , Nick Desaulniers , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, LKML , Manoj Gupta , Tiancong Wang , Stephen Hines , clang-built-linux@googlegroups.com, Masahiro Yamada Subject: Re: [PATCH] x86/vdso: include generic __lshrdi3 in 32-bit vDSO Message-ID: <20190318085916.GH6058@hirez.programming.kicks-ass.net> References: <20190315222906.GC112750@google.com> <33DE9AEF-C51C-4021-97FD-BEE2C5D98DBE@zytor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <33DE9AEF-C51C-4021-97FD-BEE2C5D98DBE@zytor.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 15, 2019 at 04:18:31PM -0700, hpa@zytor.com wrote: > Note: it is also probably no reason to use -Os/-Oz for the vdso. Is anyone actually using -Os and CONFIG_CC_OPTIMIZE_FOR_SIZE ? I've been staring at compiler output a lot lately and -Os really generates atrocious crap. That is, should we just get rid of it?