Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp2089059imu; Wed, 21 Nov 2018 06:35:06 -0800 (PST) X-Google-Smtp-Source: AFSGD/VjHqh39NWtAB7FpqRJ5GBicK0u2ipC56sdZxCXDkH79TH8VLDtCy5SZdI6qrAOwx+NazW4 X-Received: by 2002:a63:955a:: with SMTP id t26mr6250493pgn.449.1542810906005; Wed, 21 Nov 2018 06:35:06 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1542810905; cv=none; d=google.com; s=arc-20160816; b=l4xtKNBM/hxBprohJ3vSEGbxtasYCytKUF7j2zNZ2DSrzSHVZ41P2BOr0cMrF3or+u iWptHnkzY8N63eJwoirBhBDqM+jeZksQhlY0zXaJuqRfMfT2OAQ/VnDGionmbDKGYxMJ FhB0tncdM22fF2DE3zXAR+xzs4PaKMQJy23H1ILaNfx+37n7bfO/rvqHC718fRmuAtOF SqTnyd1bM8gxMr0WyZhBYuuxOtVIx5u51mOCr86YbPpxpYjgkoo9h+ke9tvAAthwZEuH fi0RT1ZUw58CAtwsspUN5jiYFbEVYY2sGW9pIUK6miyewfsImAR3LG1al85NuQMyv9/f Umvw== 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=kt6hfTiNttZUGVDTNrX2gThPOip7ve9eMcgod/7W3cg=; b=sYRtCsYE1HQiFFyDrEphcd2LyRkXQ7ABSi5AJ878qw2ri40M0xTFuUvFktcHGeYGp5 6plT2h+Vsko+N14zItAk7qRTf17ewW2giul1V0EaStv39K6XBZy/QuSSl6UZviuLkmuz Zsm3gfjdh6q+OWlDLDPb/dMXu9Y3qqCgWZ/W7tbGUHn0qge6RWnOs+JR39NqdCWi6g91 KODCnuLmA61oipf1Kg47XpkIJ27JOJVqRUzLeytCznjhKlEMIlYi7+bDzaSyUiaLIS3S M5ai7EvAyImBoGoHzywC49fE/w4mFKX4kl932nkMxkolKXVMZRzpN5lSKlDFuspBpdw4 BH3w== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b="p7Lul/d3"; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id w11si44831038pgf.452.2018.11.21.06.34.40; Wed, 21 Nov 2018 06:35:05 -0800 (PST) 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=@kernel.org header.s=default header.b="p7Lul/d3"; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730106AbeKVAaq (ORCPT + 99 others); Wed, 21 Nov 2018 19:30:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:48238 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726612AbeKVAap (ORCPT ); Wed, 21 Nov 2018 19:30:45 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 58F492146F; Wed, 21 Nov 2018 13:56:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1542808574; bh=lXULnIjOp74TaJbzJ+owWqy1ehDHJ4u0UjoSMUW/uhg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=p7Lul/d3Jbc/L68tntV3Wl3hj1WJBYs7NKUhMAFFyZ+SUloIqIIWnWp8cQMOB8qfZ SMOi8dD/99ziySXXo2vag1lYVdeyRWoelLVGmYCtjlVejRRxa1x88sUJCfe2zuD5Df i86QZR/HDZAvWhaQn9SwLATW0qghdEJbXlDWB8lw= Date: Wed, 21 Nov 2018 14:56:11 +0100 From: Greg Kroah-Hartman To: Jiri Kosina Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, Thomas Gleixner , Peter Zijlstra , Josh Poimboeuf , Andrea Arcangeli , WoodhouseDavid , Andi Kleen , Tim Chen , SchauflerCasey Subject: Re: [PATCH 4.19 041/361] x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation Message-ID: <20181121135611.GA26411@kroah.com> References: <20181111221619.915519183@linuxfoundation.org> <20181111221625.598298393@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 Wed, Nov 21, 2018 at 02:21:15PM +0100, Jiri Kosina wrote: > On Sun, 11 Nov 2018, Greg Kroah-Hartman wrote: > > > 4.19-stable review patch. If anyone has any objections, please let me know. > > Greg, please drop this patch from all -stable for now. Version that > wouldn't have such performance impact is being worked on. Is it reverted in Linus's tree? If not, then anything that comes "later on" will not apply here, right? I see the thread asking about this, but I got really conflicting messages here, and now it's in all of the latest releases, and no testing seems to have uncovered issues. Is it just a "slow down" problem? thanks, greg k-h