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=-2.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 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 82FCEC4CECA for ; Sat, 14 Sep 2019 11:39:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5AA822084F for ; Sat, 14 Sep 2019 11:39:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alien8.de header.i=@alien8.de header.b="Si8Rm01W" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730155AbfINLjp (ORCPT ); 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