Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8DD6C636CC for ; Mon, 13 Feb 2023 22:54:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230234AbjBMWyT (ORCPT ); Mon, 13 Feb 2023 17:54:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52966 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229615AbjBMWyR (ORCPT ); Mon, 13 Feb 2023 17:54:17 -0500 Received: from trent.utfs.org (trent.utfs.org [94.185.90.103]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7CE9D83E6 for ; Mon, 13 Feb 2023 14:54:16 -0800 (PST) Received: from localhost (localhost [IPv6:::1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by trent.utfs.org (Postfix) with ESMTPS id 3C3C15F7C3; Mon, 13 Feb 2023 23:54:14 +0100 (CET) Date: Mon, 13 Feb 2023 23:54:14 +0100 (CET) From: Christian Kujau To: Juergen Gross cc: mikelley@microsoft.com, Linux regressions mailing list , linux-kernel@vger.kernel.org, x86@kernel.org, torvalds@linux-foundation.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" Subject: Re: [PATCH v2 5/8] x86/mtrr: revert commit 90b926e68f50 In-Reply-To: Message-ID: <47d6d93f-defd-d18a-276a-417252e7ddce@nerdbynature.de> References: <20230209072220.6836-1-jgross@suse.com> <20230209072220.6836-6-jgross@suse.com> <9046a3cb-928a-5476-1e72-63bd197c039e@leemhuis.info> <129d8c1d-ffa6-dac2-f516-dab4fc8c6218@suse.com> <6e4198c2-d79c-8ebd-82f7-3826dd807f1b@nerdbynature.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 13 Feb 2023, Juergen Gross wrote: > Hmm, this would make Hyper-V SEV-SNP guests slow again. > > I'm not completely against it, but OTOH I'm a little bit biased as the > maintainer of the Xen code. :-) Understood. I'm a bit puzzled why nobody else reports this, maybe Xen Dom0 and external USB enclosures are not that common. > Michael, would you see major problems with doing the revert before having > the final patches for fixing your issue, too? If that revert ends up in mainline, feel free to add: Tested-by: Christian Kujau ...if that makes any difference. Thanks, Christian. -- BOFH excuse #199: the curls in your keyboard cord are losing electricity.