Received: by 2002:a05:6a10:a0d1:0:0:0:0 with SMTP id j17csp1650826pxa; Thu, 6 Aug 2020 12:28:02 -0700 (PDT) X-Google-Smtp-Source: ABdhPJy3w+U8myEGHcoZTZnfT1NzSfkvWar0fK+e65TkurDDrRWxQygVU7F0xYuI/zPSlj0ocHiu X-Received: by 2002:a17:907:205c:: with SMTP id pg28mr5637652ejb.22.1596742082606; Thu, 06 Aug 2020 12:28:02 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1596742082; cv=none; d=google.com; s=arc-20160816; b=cZoh8TDAlOPTqJR6XXlOJ2dDgrB8+9zZZqvrfkO93wAio2BFLHCjfgQgbvPvIUWELq 8QzdlnHIRaelil6ZZ75ywipdYF0i++1d4sHC4zcUEchbb+3DL2mowrWnoCscxkQpHpug orBwOGK/9bKdHjS4V4YWMbu/XxAMTi7aiuvzjqHMTbVIcruM810ACoCNCW8/f6XloHlR FRYs4blJHXPURH3AXEnbK5NFVtNLs/F+lZOY3vR8ro4Lf9T7wrEpgNgK9M8k6QUAVVf5 aN+1kDzq0q/VqPBXcB7Wk+fP/beW+vuLt9shjA1JKgJ3NDOw5Pr5O/hJJkMwywV7sgV8 cGFw== 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; bh=9O3ik49YaiTqlK4aLWw6ylaniMUA0MLEPahkQmP3Cww=; b=BKKOOQS4ZiVtt/hte/Ie9k5IBTo7VTRVLN4WZp/eFd00q8nkXtXbB+8x/GbfYt6ZLL 6lpCC2pcw46fW7kNKUVkv9cllvsX4DbeHinV1WvieH5jUxViXmzeKoXOrNS8oKrdxF6O fsMyOP4+2gczU6mMGoTaWrMefkn/TVQgdhINjWzj3N/uIp2X/fHgeRwnWfb2V4E4Knr+ +y7D8XqYhwwogLqqffVRE8paEklGaam7BFqd0kwU+FTa5rgYEvuzcSv7KsZe+hvWDzgA bVhiO6fAg6vNhUP2LRXHkqyrAaXAtYmhMtvppzldTFFQCCrUB85pl/NQ7RFTuLrta09B O6yQ== ARC-Authentication-Results: i=1; mx.google.com; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id w21si3489979edi.330.2020.08.06.12.27.39; Thu, 06 Aug 2020 12:28:02 -0700 (PDT) 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; 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 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726150AbgHFTXg (ORCPT + 99 others); Thu, 6 Aug 2020 15:23:36 -0400 Received: from mx2.suse.de ([195.135.220.15]:33610 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726055AbgHFTXf (ORCPT ); Thu, 6 Aug 2020 15:23:35 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 545E9AF19; Thu, 6 Aug 2020 19:23:52 +0000 (UTC) Date: Thu, 6 Aug 2020 21:23:33 +0200 From: Joerg Roedel To: Linus Torvalds Cc: Ingo Molnar , "Jason A. Donenfeld" , Linux Kernel Mailing List , Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Andrew Morton Subject: Re: [GIT PULL] x86/mm changes for v5.9 Message-ID: <20200806192333.GB24304@suse.de> References: <20200803190354.GA1293087@gmail.com> <20200805110348.GA108872@zx2c4.com> <20200806131034.GA2067370@gmail.com> <20200806185723.GA24304@suse.de> 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 Thu, Aug 06, 2020 at 12:02:40PM -0700, Linus Torvalds wrote: > But you may obviously have different settings for CONFIG_X86_5LEVEL, > and maybe that ends up changing something? > > But since apparently it's not immediately obvious what the problem is, > I'll revert it for now. Yes, that's the best for now. My gut feeling is that the fault Jason is seeing didn't happen on a vmalloc address, but I can't prove that yet. And if this is true it means that more work is needed before the syncing on x86-64 can be removed, so reverting is the best for now. Jason, can you share more details about the test setup which triggers this? Like the .config and the machine setup, ideally a qemu command-line, and how to reproduce it on that setup. Thanks, Joerg