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[23.128.96.18]) by mx.google.com with ESMTP id gn26si15799820ejc.739.2020.11.17.13.29.42; Tue, 17 Nov 2020 13:30:05 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@alien8.de header.s=dkim header.b="DYsUMLz/"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 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 S1727271AbgKQV0K (ORCPT + 99 others); Tue, 17 Nov 2020 16:26:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725730AbgKQV0K (ORCPT ); Tue, 17 Nov 2020 16:26:10 -0500 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1C417C0613CF for ; Tue, 17 Nov 2020 13:26:10 -0800 (PST) Received: from zn.tnic (p200300ec2f10130053cbbcbd889a5460.dip0.t-ipconnect.de [IPv6:2003:ec:2f10:1300:53cb:bcbd:889a:5460]) (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 95B311EC03FA; Tue, 17 Nov 2020 22:26:08 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1605648368; 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=mdlatLQLA3IrahHrmrq1ojL+zzTVd5uHpcM6WKS/HMQ=; b=DYsUMLz/dS7BTVXoTb4HloaqoXXVKn2w6QCCCF2E/fSASIv/vhHZ7YWqbtz/N3ru7QbmSI gVTD8rT68TxxpD9YNicnJFsrhB6hU92Cf5aNs0VvKA+U2NruhYBrtuFyDt54A9cckzqsCh EeZOd+i02B978beqVFxyTFGGq8UmOvA= Date: Tue, 17 Nov 2020 22:26:08 +0100 From: Borislav Petkov To: Alexandre Chartre Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, jroedel@suse.de, konrad.wilk@oracle.com, jan.setjeeilers@oracle.com, junaids@google.com, oweisse@google.com, rppt@linux.vnet.ibm.com, graf@amazon.de, mgross@linux.intel.com, kuzuno@gmail.com Subject: Re: [RFC][PATCH v2 00/21] x86/pti: Defer CR3 switch to C code Message-ID: <20201117212608.GS5719@zn.tnic> References: <20201116144757.1920077-1-alexandre.chartre@oracle.com> <20201116201711.GE1131@zn.tnic> <44a88648-738a-4a4b-9c25-6b70000e037c@oracle.com> <20201117165539.GG5719@zn.tnic> <890f6b7e-a268-2257-edcb-5eacc7db3d8e@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <890f6b7e-a268-2257-edcb-5eacc7db3d8e@oracle.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 17, 2020 at 07:12:07PM +0100, Alexandre Chartre wrote: > Some benchmarks are available, in particular from phoronix: What I was expecting was benchmarks *you* have run which show that perf penalty, not something one can find quickly on the internet and something one cannot always reproduce her-/himself. You do know that presenting convincing numbers with a patchset greatly improves its chances of getting it upstreamed, right? -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette