From mboxrd@z Thu Jan 1 00:00:00 1970 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965244AbeAJL6W (ORCPT + 1 other); Wed, 10 Jan 2018 06:58:22 -0500 Received: from twosheds.infradead.org ([90.155.92.209]:38020 "EHLO twosheds.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965219AbeAJL6S (ORCPT ); Wed, 10 Jan 2018 06:58:18 -0500 Message-ID: <1515585487.22302.120.camel@infradead.org> Subject: Re: [PATCH] x86/alternatives: Fix optimize_nops() checking From: David Woodhouse To: Borislav Petkov Cc: Linus Torvalds , Andi Kleen , Thomas Gleixner , the arch/x86 maintainers , Linux Kernel Mailing List , Paul Turner , Andrew Lutomirski , Peter Zijlstra , Tom Lendacky , Tim Chen , Greg Kroah-Hartman , Dave Hansen , Jiri Kosina , Andi Kleen In-Reply-To: <20180110115705.263m5ypkjfxyrbrn@pd.tnic> References: <20180110003139.10531-1-andi@firstfloor.org> <1515568506.22302.72.camel@infradead.org> <1515578735.22302.91.camel@infradead.org> <20180110112815.mgciyf5acwacphkq@pd.tnic> <1515584201.22302.113.camel@infradead.org> <20180110114528.4ceo5akuen2wnjx2@pd.tnic> <1515584995.22302.117.camel@infradead.org> <20180110115705.263m5ypkjfxyrbrn@pd.tnic> Face: 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 Content-Type: multipart/signed; micalg="sha-256"; protocol="application/x-pkcs7-signature"; boundary="=-uKvcf0Qfa8lvYLdqzX0T" Date: Wed, 10 Jan 2018 11:58:07 +0000 Mime-Version: 1.0 X-Mailer: Evolution 3.18.5.2-0ubuntu3.2 X-SRS-Rewrite: SMTP reverse-path rewritten from by twosheds.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Return-Path: --=-uKvcf0Qfa8lvYLdqzX0T Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2018-01-10 at 12:57 +0100, Borislav Petkov wrote: > On Wed, Jan 10, 2018 at 11:49:55AM +0000, David Woodhouse wrote: > > Don't suppose you want to make the alignment actually *work*? :) >=20 > I can try but only if it is really worth it. If we don't see it in > measurements, then it is wasted time and energy and added needless > code complexity. Agreed. 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