Received: by 2002:a25:c593:0:0:0:0:0 with SMTP id v141csp2392714ybe; Sat, 14 Sep 2019 14:06:06 -0700 (PDT) X-Google-Smtp-Source: APXvYqyArIzx8flxkrDE+su/gzhlrZWkrJa5LjsSteyzjM6+BMEbnoILgsxs6NuLVyclxlYsqJzC X-Received: by 2002:a17:906:4cca:: with SMTP id q10mr13481065ejt.236.1568495166514; Sat, 14 Sep 2019 14:06:06 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1568495166; cv=none; d=google.com; s=arc-20160816; b=t340o4I9BJY8YMP1t2/OkrAsAmkrNLNojHiT3cJXSBWpBKK22bRRfYy7ApdOQttaO3 RYnpTKq1L3ottq5DZH1yoR+jQzEVmSvF1JFLj08JFxCbLfq+u4JCBRCKbEJL3aRst7+I fVLQBcAwLtu4klLXKi2cT9z5UaeEZLycZhQ6uaBrPcyXzHP0C6Lw+9BtBMttplPCfy02 9+vbxtn6TjH1yNrVXgwhfIg+HNTVRlsbRi27c9laJtMtt/l6GQTiWXZwXzQzhplJfwXB v/UYw2wShLaOpkfa3sTxYB0qXZqGvEMOHxR7McqfWGfvtxTfYMeZGr2O/IFEFL4Ka1bz S+jg== 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=2oTHepezaAE9EkOCAGadNA75IAqW7ewhq7ozsC6F6IQ=; b=DpFOCfDcO1Kiij+gmTeUoh0aL9oKeRfLNwVS37eZqhU+iq/0X50TxIE3ivrPPkF2R5 uNkh9sTlJEti+WwHlqPJfX98a3/v0k1hNI0Zn7PZdhiOiJklcPBpXiMthWdrTNU8MLbT 5tgel0/g+pHBi26SuA9vKpMLE6nGXLZNPDsPvi29bbo0MOYIOyIL/luJugNI720veGrK N7mCgEucBzwYW7Hz9sBkVLxg8wGKZ51cRmY86F751lHHDjIvglKOJ3o0kn7t1+9JkIAp 44lZZd6dM8w9fR9ll3I77yadayMUzYmsddLm76ZxGs/bNDnBH8Bj/0Sr8JL4WTl6yqEA ijSw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b=Si8Rm01W; 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 g20si20973934edb.149.2019.09.14.14.05.43; Sat, 14 Sep 2019 14:06:06 -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=Si8Rm01W; 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 S1730121AbfINLjp (ORCPT + 99 others); Sat, 14 Sep 2019 07:39:45 -0400 Received: from mail.skyhub.de ([5.9.137.197]:39970 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729982AbfINLjp (ORCPT ); Sat, 14 Sep 2019 07:39:45 -0400 Received: from zn.tnic (p200300EC2F1C9800880C871C53BB2BF4.dip0.t-ipconnect.de [IPv6:2003:ec:2f1c:9800:880c:871c:53bb:2bf4]) (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 F42111EC0C48; Sat, 14 Sep 2019 13:39:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1568461184; 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=2oTHepezaAE9EkOCAGadNA75IAqW7ewhq7ozsC6F6IQ=; b=Si8Rm01W/UL9YljCOhzm6sNmimt6ZrbE3E1AcXAH1sNDpFwD+HcPvYxC4bg24pVpUR+VqY 3K+dpDVY3I8+hCTje81CUdujNP+98U31afHlRubGmlaaMUQtwET+L1r0m1lIx3M31JOMBx wRQKUi4ikLl+pEYQxQB249zsuKQQ7Jk= Date: Sat, 14 Sep 2019 13:39:41 +0200 From: Borislav Petkov To: Alexey Dobriyan Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, x86@kernel.org, linux@rasmusvillemoes.dk, torvalds@linux-foundation.org Subject: Re: [RFC] Improve memset Message-ID: <20190914113941.GB28054@zn.tnic> References: <20190914092915.GA17409@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20190914092915.GA17409@avx2> 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 Sat, Sep 14, 2019 at 12:29:15PM +0300, Alexey Dobriyan wrote: > eh... I'd just drop it. These registers screw up everything. The intent is to not touch memset_orig and let it die with its users. It is irrelevant now anyway. If it can be shown that the extended list of clobbered registers hurt performance, then we can improve it for the sake of keeping register pressure low. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette