Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp978422ybe; Thu, 19 Sep 2019 06:54:58 -0700 (PDT) X-Google-Smtp-Source: APXvYqzem87DntFT3wF+dvQAGLnADUl1ugg8+87R8xlgk0vWKSjzxZCbTng9hf4oCB09k4foqjlt X-Received: by 2002:a17:906:c47:: with SMTP id t7mr7963786ejf.133.1568901298278; Thu, 19 Sep 2019 06:54:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1568901298; cv=none; d=google.com; s=arc-20160816; b=BdrvgDwXTMnTkcgFQTX0Y/2o95mQ54infhcdqmGtCWnjB3ZI44cUxvq5/eUSfXvC98 gfKFW0CleJaaDDaf9gftlspue4eG9J23JHF8ObVSwB0BTyQH/9UQ0oVFCoUpA4zugyz7 QvhdV3L4fow05/icrclU6lMQEBUGgXNT3LADhlZKO7hBoTXuDKpfX0GNP0/VBRN3fn1R PEs6xSKvUfIu8P9CeGyAHbSzFiqlW98k5bWIMqKdFkL3NmRwERVxRJkrwRT9Je44byhP touhBbPMCfWxH6iobCCkfdJDPtH7SPaagxWhnNsFkswaydcjsltn2JzvmixFVDxMryAh n1vg== 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-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=SvivuKiDv8mVFUG8Dwck4C5w7ji5KE7vzCHmIg2WcWA=; b=Lv148Uz4t5LZua0ciTeCIHG1+E+tzsgP8tLPiywDEntTmtAcBYHd+E4YYgz+CEfm5x KyFCrG4q2YZmBUsidhHyJibZW7lAfBVFgbLNUTub0EdupGJcsZPBjvoD6J7jhIBA3wGO X0fiHxrlS/iygGYrQ+nkzV6xFsJCsbH399TYBZVVfMTuId4WARzf0dzw1UT49/DMfZui F47+de+qDH5PPB53GQQ+KOG+wU4MuGdJaLy9mpOmITduOrOXdO0S+PW35VJKW28JN3wM rLwvoD5kbDW3NYfPu8U3gspjkOnzNQzN+P2NSexURSVAJR7zwOuyDSDndSvF+1W9wFhi JZcA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=Gm83Egjv; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id h7si2400585ejx.59.2019.09.19.06.54.35; Thu, 19 Sep 2019 06:54:58 -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; dkim=pass header.i=@alien8.de header.s=dkim header.b=Gm83Egjv; 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; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=alien8.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390346AbfISMtY (ORCPT + 99 others); Thu, 19 Sep 2019 08:49:24 -0400 Received: from mail.skyhub.de ([5.9.137.197]:36500 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387520AbfISMtY (ORCPT ); Thu, 19 Sep 2019 08:49:24 -0400 Received: from nazgul.tnic (unknown [193.86.95.52]) (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 039051EC04BC; Thu, 19 Sep 2019 14:49:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1568897363; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=SvivuKiDv8mVFUG8Dwck4C5w7ji5KE7vzCHmIg2WcWA=; b=Gm83Egjv2y3IHZ04hPe2qsDYEgMJriGC4xoXzWN3ngcLi7Koh2ogXS7vrbWty0heJ+fDmi azz3rpDWHqDXmn6pBaIhSPsV5nAemg/PVcripkux1vbO/EgG+9A9rGJfnq+vFt5b40Z5ws oOojf3v2beto+6aJgr//DYM1SQe2uzY= Date: Thu, 19 Sep 2019 14:49:11 +0200 From: Borislav Petkov To: Josh Poimboeuf Cc: x86-ml , Andy Lutomirski , Linus Torvalds , lkml Subject: Re: [RFC] Improve memset Message-ID: <20190919124911.GA18148@nazgul.tnic> References: <20190913072237.GA12381@zn.tnic> <20190917201021.evoxxj7vkcb45rpg@treble> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190917201021.evoxxj7vkcb45rpg@treble> 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 Tue, Sep 17, 2019 at 03:10:21PM -0500, Josh Poimboeuf wrote: > Then the "reverse alternatives" feature wouldn't be needed anyway. The intent was to have the default, most-used version be there at build-time, obviating the need to patch. Therefore on those old !ERMS CPUs we'll end up doing rep;stosb before patching, which is supported, albeit slow. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. --