Received: by 2002:ac0:a594:0:0:0:0:0 with SMTP id m20-v6csp4665174imm; Fri, 18 May 2018 08:43:03 -0700 (PDT) X-Google-Smtp-Source: AB8JxZq4QhCovo3SzeYGLKgNHdcJEfmdGLxxgtUMFdU0MbCkbOG8CxsuUZFeIe54jxbkvRa0NPsP X-Received: by 2002:a62:d605:: with SMTP id r5-v6mr10045564pfg.8.1526658183602; Fri, 18 May 2018 08:43:03 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1526658183; cv=none; d=google.com; s=arc-20160816; b=EhYPcVbaW3xGGfWZP5zxCSMGfstQD62PMSsEO1cneaN0dLgZvpDPntaQUh1g211d4A 6EFoUZ3jn7lcQm7iXY5JHGXQ6dIqknAz5p09EPH7RxF0mAlL2tjw9TwsqEPIuQJqzPgW 3fW/hzq+CXqYKeSu70UJQi7qyrLNX65Pk49f/0OZVSxJJN1yDj3OrznbktxuEo60RESw JqipqVCQoFUHyyOvgbe3ZRvofLw09wN6p5nmuEKIHohqnt08+CUDXHQ77dGIUjhIYFtg AAjilngcyUIkuMDfbQWe1rNAL3oOvIWkeRW3LATzUWbGsJ1yPBChRyI+Zo+V4nRCAckf eiqA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-transfer-encoding:content-disposition:mime-version :references:message-id:subject:cc:to:from:date :arc-authentication-results; bh=oUew+ugshaeQvvK3GHu/t8AQ48rxHED+C2nsIVV592s=; b=c784qksaRdNs2Cwer8l279UmHV2pGZKt3zlRClbsJXCXUSPSoyeRx2nvh0PMOXIKgt xwDN8aWfBDC+uYX5Gwl8AslfnMjk7qIpDpPAc1mUHUvYX+g25DvtKDr+Up0ARfaFg5mS xfMBIw1V+7QBtqQDj7yPRm9gSXmmP6yF5uTLGVFA9rxG8BbrAyhZ4pWlBbc2ma5J8ki5 OAknKDcjsFtxyMmTeY+UzZfVxSlbAT7fvh9SgNHVXa5HyCH1371duIq4dWBwjhhVzZea LqYqf+7u1N9uPP0Fiewlv3ewEQtWVaG3MaxG2/PlzVShfhDw9q1YYLKGPOr/I9AuDflE y74Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id y67-v6si7837355pfi.195.2018.05.18.08.42.48; Fri, 18 May 2018 08:43:03 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751994AbeERPlX (ORCPT + 99 others); Fri, 18 May 2018 11:41:23 -0400 Received: from mail.skyhub.de ([5.9.137.197]:38434 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750841AbeERPlU (ORCPT ); Fri, 18 May 2018 11:41:20 -0400 X-Virus-Scanned: Nedap ESD1 at mail.skyhub.de Received: from mail.skyhub.de ([127.0.0.1]) by localhost (blast.alien8.de [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id GLJBswK4RSQV; Fri, 18 May 2018 17:41:03 +0200 (CEST) Received: from pd.tnic (p200300EC2BC87100E112EAEA647B5E34.dip0.t-ipconnect.de [IPv6:2003:ec:2bc8:7100:e112:eaea:647b:5e34]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 7A8BE1EC02B1; Fri, 18 May 2018 17:41:03 +0200 (CEST) Date: Fri, 18 May 2018 17:40:44 +0200 From: Borislav Petkov To: Nadav Amit Cc: Ingo Molnar , Peter Zijlstra , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Josh Poimboeuf , Linus Torvalds , Andy Lutomirski , Peter Zijlstra , Denys Vlasenko Subject: Re: [PATCH 2/6] x86: bug: prevent gcc distortions Message-ID: <20180518154044.GE17285@pd.tnic> References: <20180517161402.78089-1-namit@vmware.com> <20180517161402.78089-3-namit@vmware.com> <20180518075853.GD12217@hirez.programming.kicks-ass.net> <20180518081354.GA11379@gmail.com> <20180518101114.GB17285@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.9.3 (2018-01-21) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 18, 2018 at 02:36:21PM +0000, Nadav Amit wrote: > I didn’t try too hard to find more affected (micro)benchmarks, but I am > pretty sure there are: So you being pretty sure there are, doesn't make me go, oh, ok, then, this is an uglification we should try to live with. It is still ugly with no proven benefit from it. -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.