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=-2.3 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham 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 4467DC282C4 for ; Thu, 7 Feb 2019 09:51:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05AC020823 for ; Thu, 7 Feb 2019 09:51:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="g106yszJ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727282AbfBGJvK (ORCPT ); Thu, 7 Feb 2019 04:51:10 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:51758 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726293AbfBGJvJ (ORCPT ); Thu, 7 Feb 2019 04:51:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=7QUMRd8sHfwEbmpKYSOP457ObAXIC60C2pWHkWhJjFE=; b=g106yszJCTkh/ZjCW2lNBoW+j wcQzDb+lS0LeHqYCoHsYGwKQCFuet+oEhulz+ChVAePufcaRtw1yVmxPjkN7yyQKmIBze+/3X23/F thZIqOsvG9fx0wtGt20BqBFc6nyrSTkSNLZzsCAVxrMEJoV/DYiXEheQIrdZ7ukIMcgVEXdePHtDX N3dOJI0Rc/FBeIVvFPGdHrDDIwiIVQYMPSJLzIIo+cJ0EAIxsj5phCrUGC2C7QXmsppJpoe9jcKQC 1xqE+nD5D90MzgWu9Uok8oZAXorcsrGgC8JB4SKZ5g/gGsWMDitdUg9C/kkcWyLP1qa/hV4lqq6Vc e2FnyTDEA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1grgKg-0007HQ-Rm; Thu, 07 Feb 2019 09:50:59 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 113B7201A1B22; Thu, 7 Feb 2019 10:50:56 +0100 (CET) Date: Thu, 7 Feb 2019 10:50:56 +0100 From: Peter Zijlstra To: Dave Hansen Cc: "Luck, Tony" , Ingo Molnar , Linus Torvalds , linux-kernel@vger.kernel.org, Dave Hansen , Andy Lutomirski , Borislav Petkov , Thomas Gleixner , Rik van Riel Subject: Re: [GIT PULL] x86/mm changes for v4.21 Message-ID: <20190207095056.GA32511@hirez.programming.kicks-ass.net> References: <20181224231106.GA27438@gmail.com> <20190207001737.GA32096@agluck-desk> <8b0b85cb-c08e-3426-fe34-0b6dfc9c0cc4@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8b0b85cb-c08e-3426-fe34-0b6dfc9c0cc4@intel.com> 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, Feb 06, 2019 at 04:33:54PM -0800, Dave Hansen wrote: > I wonder if the patches that you bisected to just changed the flushing > from being CR3-based (and not taking an address) to being INVPCID-based, > and taking an address that is sensitive to canonicality. That is indeed one of the things that patch series does; before this it would always flush world for ARRAY interfaces. I'll have a look at the code; I seem to remember there being test for canonical addresses, maybe they're not in the right place.